added superuser ips whitelist

2026-05-19 06:11:43 -04:00 · 2026-05-01 17:42:55 +03:00
parent fe2d90641c
commit 21a5524fed
34 changed files with 1224 additions and 47 deletions
--- a/apis/backup.go
+++ b/apis/backup.go
@@ -70,8 +70,10 @@ func backupDownload(e *core.RequestEvent) error {
 		return e.ForbiddenError("Insufficient permissions to access the resource.", err)
 	}

-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
-	defer cancel()
+	allowedIPs := e.App.Settings().SuperuserIPs
+	if len(allowedIPs) > 0 && !isIPInList(allowedIPs, e.RealIP()) {
+		return e.ForbiddenError("Insufficient permissions to access the resource.", nil)
+	}

 	fsys, err := e.App.NewBackupsFilesystem()
 	if err != nil {
@@ -79,6 +81,9 @@ func backupDownload(e *core.RequestEvent) error {
 	}
 	defer fsys.Close()

+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
+	defer cancel()
+
 	fsys.SetContext(ctx)

 	key := e.Request.PathValue("key")
--- a/apis/backup_test.go
+++ b/apis/backup_test.go
@@ -528,6 +528,58 @@ func TestBackupsDownload(t *testing.T) {
 			},
 			ExpectedEvents: map[string]int{"*": 0},
 		},
+		{
+			Name:    "with valid superuser file token AND whitelisted IP",
+			Method:  http.MethodGet,
+			URL:     "/api/backups/test1.zip?token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6InN5d2JoZWNuaDQ2cmhtMCIsImV4cCI6MjUyNDYwNDQ2MSwidHlwZSI6ImZpbGUiLCJjb2xsZWN0aW9uSWQiOiJwYmNfMzE0MjYzNTgyMyJ9.Lupz541xRvrktwkrl55p5pPCF77T69ZRsohsIcb2dxc",
+			Headers: map[string]string{"x-test-ip": "127.0.0.1"},
+			BeforeTestFunc: func(t testing.TB, app *tests.TestApp, e *core.ServeEvent) {
+				if err := createTestBackups(app); err != nil {
+					t.Fatal(err)
+				}
+
+				app.Settings().TrustedProxy = core.TrustedProxyConfig{
+					Headers: []string{"x-test-ip"},
+				}
+
+				app.Settings().SuperuserIPs = []string{"127.0.0.1"}
+
+				if err := app.Save(app.Settings()); err != nil {
+					t.Fatal(err)
+				}
+			},
+			ExpectedStatus: 200,
+			ExpectedContent: []string{
+				"storage/",
+				"data.db",
+				"auxiliary.db",
+			},
+			ExpectedEvents: map[string]int{"*": 0},
+		},
+		{
+			Name:    "with valid superuser file token BUT non-whitelisted IP",
+			Method:  http.MethodGet,
+			URL:     "/api/backups/test1.zip?token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6InN5d2JoZWNuaDQ2cmhtMCIsImV4cCI6MjUyNDYwNDQ2MSwidHlwZSI6ImZpbGUiLCJjb2xsZWN0aW9uSWQiOiJwYmNfMzE0MjYzNTgyMyJ9.Lupz541xRvrktwkrl55p5pPCF77T69ZRsohsIcb2dxc",
+			Headers: map[string]string{"x-test-ip": "127.0.0.1"},
+			BeforeTestFunc: func(t testing.TB, app *tests.TestApp, e *core.ServeEvent) {
+				if err := createTestBackups(app); err != nil {
+					t.Fatal(err)
+				}
+
+				app.Settings().TrustedProxy = core.TrustedProxyConfig{
+					Headers: []string{"x-test-ip"},
+				}
+
+				app.Settings().SuperuserIPs = []string{"0.0.0.0"}
+
+				if err := app.Save(app.Settings()); err != nil {
+					t.Fatal(err)
+				}
+			},
+			ExpectedStatus:  403,
+			ExpectedContent: []string{`"data":{}`},
+			ExpectedEvents:  map[string]int{"*": 0},
+		},
 	}

 	for _, scenario := range scenarios {
--- a/apis/base.go
+++ b/apis/base.go
@@ -31,6 +31,7 @@ func NewRouter(app core.App) (*router.Router[*core.RequestEvent], error) {
 	pbRouter.Bind(panicRecover())
 	pbRouter.Bind(rateLimit())
 	pbRouter.Bind(loadAuthToken())
+	pbRouter.Bind(superuserIPsWhitelist())
 	pbRouter.Bind(securityHeaders())
 	pbRouter.Bind(BodyLimit(DefaultMaxBodySize))

--- a/apis/batch_test.go
+++ b/apis/batch_test.go
@@ -224,7 +224,7 @@ func TestBatchRequest(t *testing.T) {
 			},
 		},
 		{
-			Name:   "mixed create/update/delete (rules failure)",
+			Name:   "mixed create/update/delete (non-superuser rule failure)",
 			Method: http.MethodPost,
 			URL:    "/api/batch",
 			Body: strings.NewReader(`{
@@ -284,6 +284,70 @@ func TestBatchRequest(t *testing.T) {
 				}
 			},
 		},
+		{
+			Name:   "mixed create/update/delete (superuser rule failure)",
+			Method: http.MethodPost,
+			URL:    "/api/batch",
+			Headers: map[string]string{
+				// test@example.com, clients
+				"Authorization": "eyJhbGciOiJIUzI1NiJ9.eyJpZCI6ImdrMzkwcWVnczR5NDd3biIsInR5cGUiOiJhdXRoIiwiY29sbGVjdGlvbklkIjoidjg1MXE0cjc5MHJoa25sIiwiZXhwIjoyNTI0NjA0NDYxLCJyZWZyZXNoYWJsZSI6dHJ1ZX0.0ONnm_BsvPRZyDNT31GN1CKUB6uQRxvVvQ-Wc9AZfG0",
+			},
+			Body: strings.NewReader(`{
+				"requests": [
+					{"method":"DELETE", "url":"/api/collections/demo2/records/achvryl401bhse3", "headers": {"Authorization": "ignored"}},
+					{"method":"PATCH", "url":"/api/collections/demo3/records/1tmknxy2868d869", "body": {"title": "batch_update"}, "headers": {"Authorization": "ignored"}},
+					{"method":"POST", "url":"/api/collections/_superusers/records", "body": {"email":"test_batch@example.com","password":"1234567890"}}
+				]
+			}`),
+			ExpectedStatus: 400,
+			ExpectedContent: []string{
+				`"data":{`,
+				`"requests":{`,
+				`"2":{"code":"batch_request_failed"`,
+				`403`,
+			},
+			NotExpectedContent: []string{
+				`"0":`,
+				`"1":`,
+			},
+			ExpectedEvents: map[string]int{
+				"*":                        0,
+				"OnBatchRequest":           1,
+				"OnModelUpdate":            1,
+				"OnModelUpdateExecute":     1,
+				"OnModelAfterUpdateError":  1,
+				"OnModelDelete":            1,
+				"OnModelDeleteExecute":     1,
+				"OnModelAfterDeleteError":  1,
+				"OnModelValidate":          1,
+				"OnRecordUpdateRequest":    1,
+				"OnRecordUpdate":           1,
+				"OnRecordUpdateExecute":    1,
+				"OnRecordAfterUpdateError": 1,
+				"OnRecordDeleteRequest":    1,
+				"OnRecordDelete":           1,
+				"OnRecordDeleteExecute":    1,
+				"OnRecordAfterDeleteError": 1,
+				"OnRecordEnrich":           1,
+				"OnRecordValidate":         1,
+			},
+			AfterTestFunc: func(t testing.TB, app *tests.TestApp, res *http.Response) {
+				_, err = app.FindRecordById("demo2", "achvryl401bhse3")
+				if err != nil {
+					t.Fatal("Expected record to not be deleted")
+				}
+
+				_, err = app.FindFirstRecordByFilter("demo3", `title="batch_update"`)
+				if err == nil {
+					t.Fatal("Expected record to not be updated")
+				}
+
+				_, err = app.FindAuthRecordByEmail(core.CollectionNameSuperusers, "test_batch@example.com")
+				if err == nil {
+					t.Fatal("Expected superuser to not be created")
+				}
+			},
+		},
 		{
 			Name:   "mixed create/update/delete (rules success)",
 			Method: http.MethodPost,
--- a/apis/file.go
+++ b/apis/file.go
@@ -60,6 +60,7 @@ type fileApi struct {
 }

 func (api *fileApi) fileToken(e *core.RequestEvent) error {
+	// extra check for just in case the handler is called in a different context
 	if e.Auth == nil {
 		return e.UnauthorizedError("Missing auth context.", nil)
 	}
@@ -114,6 +115,15 @@ func (api *fileApi) download(e *core.RequestEvent) error {
 		token := e.Request.URL.Query().Get("token")
 		authRecord, _ := e.App.FindAuthRecordByToken(token, core.TokenTypeFile)

+		// reset the auth state if it is superuser and it is not whitelisted
+		// (not critical because file tokens are short-lived but checked nonetheless as an extra precaution)
+		if authRecord != nil && authRecord.IsSuperuser() {
+			allowedIPs := e.App.Settings().SuperuserIPs
+			if len(allowedIPs) > 0 && !isIPInList(allowedIPs, e.RealIP()) {
+				authRecord = nil
+			}
+		}
+
 		// create a shallow copy of the cached request data and adjust it to the current auth record (if any)
 		requestInfo := *originalRequestInfo
 		requestInfo.Context = core.RequestInfoContextProtectedFile
--- a/apis/file_test.go
+++ b/apis/file_test.go
@@ -353,6 +353,50 @@ func TestFileDownload(t *testing.T) {
 				"OnFileDownloadRequest": 1,
 			},
 		},
+		{
+			Name:    "protected file - superuser with non-whitelisted IP",
+			Method:  http.MethodGet,
+			URL:     "/api/files/demo1/al1h9ijdeojtsjy/300_Jsjq7RdBgA.png?token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6InN5d2JoZWNuaDQ2cmhtMCIsImV4cCI6MjUyNDYwNDQ2MSwidHlwZSI6ImZpbGUiLCJjb2xsZWN0aW9uSWQiOiJwYmNfMzE0MjYzNTgyMyJ9.Lupz541xRvrktwkrl55p5pPCF77T69ZRsohsIcb2dxc",
+			Headers: map[string]string{"x-test-ip": "127.0.0.1"},
+			BeforeTestFunc: func(t testing.TB, app *tests.TestApp, e *core.ServeEvent) {
+				app.Settings().TrustedProxy = core.TrustedProxyConfig{
+					Headers: []string{"x-test-ip"},
+				}
+
+				app.Settings().SuperuserIPs = []string{"0.0.0.0"}
+
+				err := app.Save(app.Settings())
+				if err != nil {
+					t.Fatal(err)
+				}
+			},
+			ExpectedStatus:  404,
+			ExpectedContent: []string{`"data":{}`},
+			ExpectedEvents:  map[string]int{"*": 0},
+		},
+		{
+			Name:    "protected file - superuser with whitelisted IP",
+			Method:  http.MethodGet,
+			URL:     "/api/files/demo1/al1h9ijdeojtsjy/300_Jsjq7RdBgA.png?token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6InN5d2JoZWNuaDQ2cmhtMCIsImV4cCI6MjUyNDYwNDQ2MSwidHlwZSI6ImZpbGUiLCJjb2xsZWN0aW9uSWQiOiJwYmNfMzE0MjYzNTgyMyJ9.Lupz541xRvrktwkrl55p5pPCF77T69ZRsohsIcb2dxc",
+			Headers: map[string]string{"x-test-ip": "127.0.0.1"},
+			BeforeTestFunc: func(t testing.TB, app *tests.TestApp, e *core.ServeEvent) {
+				app.Settings().TrustedProxy = core.TrustedProxyConfig{
+					Headers: []string{"x-test-ip"},
+				}
+
+				app.Settings().SuperuserIPs = []string{"127.0.0.1"}
+
+				if err := app.Save(app.Settings()); err != nil {
+					t.Fatal(err)
+				}
+			},
+			ExpectedStatus:  200,
+			ExpectedContent: []string{"PNG"},
+			ExpectedEvents: map[string]int{
+				"*":                     0,
+				"OnFileDownloadRequest": 1,
+			},
+		},
 		{
 			Name:            "protected file - guest without view access",
 			Method:          http.MethodGet,
--- a/apis/middlewares.go
+++ b/apis/middlewares.go
@@ -42,6 +42,9 @@ const (
 	DefaultLoadAuthTokenMiddlewarePriority = DefaultRateLimitMiddlewarePriority - 20
 	DefaultLoadAuthTokenMiddlewareId       = "pbLoadAuthToken"

+	DefaultSuperuserIPsWhitelistMiddlewarePriority = DefaultLoadAuthTokenMiddlewarePriority + 5
+	DefaultSuperuserIPsWhitelistMiddlewareId       = "pbSuperuserIPsWhitelist"
+
 	DefaultSecurityHeadersMiddlewarePriority = DefaultRateLimitMiddlewarePriority - 10
 	DefaultSecurityHeadersMiddlewareId       = "pbSecurityHeaders"

@@ -299,6 +302,28 @@ func securityHeaders() *hook.Handler[*core.RequestEvent] {
 	}
 }

+// superuserIPsWhitelist middleware checks the current authenticated superuser IP
+// against the configured SuperuserIPs whitelist setting.
+//
+// This middleware is registered by default for all routes.
+func superuserIPsWhitelist() *hook.Handler[*core.RequestEvent] {
+	return &hook.Handler[*core.RequestEvent]{
+		Id:       DefaultSuperuserIPsWhitelistMiddlewareId,
+		Priority: DefaultSuperuserIPsWhitelistMiddlewarePriority,
+		Func: func(e *core.RequestEvent) error {
+			if e.HasSuperuserAuth() {
+				ips := e.App.Settings().SuperuserIPs
+
+				if len(ips) > 0 && !isIPInList(ips, e.RealIP()) {
+					return e.ForbiddenError("", errors.New("superuser IP is not whitelisted"))
+				}
+			}
+
+			return e.Next()
+		},
+	}
+}
+
 // SkipSuccessActivityLog is a helper middleware that instructs the global
 // activity logger to log only requests that have failed/returned an error.
 func SkipSuccessActivityLog() *hook.Handler[*core.RequestEvent] {
--- a/apis/middlewares_rate_limit.go
+++ b/apis/middlewares_rate_limit.go
@@ -2,6 +2,7 @@ package apis

 import (
 	"errors"
+	"net/netip"
 	"sync"
 	"time"

@@ -106,6 +107,41 @@ func checkCollectionRateLimit(e *core.RequestEvent, collection *core.Collection,
 	return nil
 }

+// isIPInList checks if the specified IP is in a list of other individual IPs or subnets.
+func isIPInList(ipsOrSubnets []string, ip string) bool {
+	if ip == "" || len(ipsOrSubnets) == 0 {
+		return false
+	}
+
+	// normalize
+	searchAddr, err := netip.ParseAddr(ip)
+	if err != nil {
+		return false
+	}
+
+	for _, item := range ipsOrSubnets {
+		// subnet?
+		prefix, err := netip.ParsePrefix(item)
+		if err == nil {
+			if prefix.Contains(searchAddr) {
+				return true
+			}
+			continue
+		}
+
+		// individual ip?
+		addr, err := netip.ParseAddr(item)
+		if err == nil {
+			if addr == searchAddr {
+				return true
+			}
+			continue
+		}
+	}
+
+	return false
+}
+
 // -------------------------------------------------------------------

 // @todo consider exporting as helper?
--- a/apis/middlewares_test.go
+++ b/apis/middlewares_test.go
@@ -553,3 +553,96 @@ func TestRequireSameCollectionContextAuth(t *testing.T) {
 		scenario.Test(t)
 	}
 }
+
+func TestSuperuserIPsWhitelist(t *testing.T) {
+	t.Parallel()
+
+	setupWhitelist := func(superuserIPs ...string) func(t testing.TB, app *tests.TestApp, e *core.ServeEvent) {
+		return func(t testing.TB, app *tests.TestApp, e *core.ServeEvent) {
+			// allow loading a mock IP from the test scenario
+			app.Settings().TrustedProxy = core.TrustedProxyConfig{
+				Headers: []string{"x-test-ip"},
+			}
+
+			app.Settings().SuperuserIPs = superuserIPs
+
+			err := app.Save(app.Settings())
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			e.Router.GET("/my/test", func(e *core.RequestEvent) error {
+				return e.String(200, "test123")
+			})
+		}
+	}
+
+	scenarios := []tests.ApiScenario{
+		{
+			Name:            "guest with non-matching IP",
+			Method:          http.MethodGet,
+			URL:             "/my/test",
+			Headers:         map[string]string{"x-test-ip": "127.0.0.1"},
+			BeforeTestFunc:  setupWhitelist("0.0.0.0"),
+			ExpectedStatus:  200,
+			ExpectedContent: []string{"test123"},
+			ExpectedEvents:  map[string]int{"*": 0},
+		},
+		{
+			Name:   "regular user with non-matching IP",
+			Method: http.MethodGet,
+			URL:    "/my/test",
+			Headers: map[string]string{
+				"x-test-ip":     "127.0.0.1",
+				"Authorization": "eyJhbGciOiJIUzI1NiJ9.eyJpZCI6IjRxMXhsY2xtZmxva3UzMyIsInR5cGUiOiJhdXRoIiwiY29sbGVjdGlvbklkIjoiX3BiX3VzZXJzX2F1dGhfIiwiZXhwIjoyNTI0NjA0NDYxLCJyZWZyZXNoYWJsZSI6dHJ1ZX0.ZT3F0Z3iM-xbGgSG3LEKiEzHrPHr8t8IuHLZGGNuxLo",
+			},
+			BeforeTestFunc:  setupWhitelist("0.0.0.0"),
+			ExpectedStatus:  200,
+			ExpectedContent: []string{"test123"},
+			ExpectedEvents:  map[string]int{"*": 0},
+		},
+		{
+			Name:   "superuser with non-matching IP",
+			Method: http.MethodGet,
+			URL:    "/my/test",
+			Headers: map[string]string{
+				"x-test-ip":     "127.0.0.1",
+				"Authorization": "eyJhbGciOiJIUzI1NiJ9.eyJpZCI6InN5d2JoZWNuaDQ2cmhtMCIsInR5cGUiOiJhdXRoIiwiY29sbGVjdGlvbklkIjoicGJjXzMxNDI2MzU4MjMiLCJleHAiOjI1MjQ2MDQ0NjEsInJlZnJlc2hhYmxlIjp0cnVlfQ.UXgO3j-0BumcugrFjbd7j0M4MQvbrLggLlcu_YNGjoY",
+			},
+			BeforeTestFunc:  setupWhitelist("0.0.0.0"),
+			ExpectedStatus:  403,
+			ExpectedContent: []string{`"data":{}`},
+			ExpectedEvents:  map[string]int{"*": 0},
+		},
+		{
+			Name:   "superuser with matching IP",
+			Method: http.MethodGet,
+			URL:    "/my/test",
+			Headers: map[string]string{
+				"x-test-ip":     "127.0.0.1",
+				"Authorization": "eyJhbGciOiJIUzI1NiJ9.eyJpZCI6InN5d2JoZWNuaDQ2cmhtMCIsInR5cGUiOiJhdXRoIiwiY29sbGVjdGlvbklkIjoicGJjXzMxNDI2MzU4MjMiLCJleHAiOjI1MjQ2MDQ0NjEsInJlZnJlc2hhYmxlIjp0cnVlfQ.UXgO3j-0BumcugrFjbd7j0M4MQvbrLggLlcu_YNGjoY",
+			},
+			BeforeTestFunc:  setupWhitelist("0.0.0.0", "127.0.0.1"),
+			ExpectedStatus:  200,
+			ExpectedContent: []string{"test123"},
+			ExpectedEvents:  map[string]int{"*": 0},
+		},
+		{
+			Name:   "superuser with no whitelisted IPs",
+			Method: http.MethodGet,
+			URL:    "/my/test",
+			Headers: map[string]string{
+				"x-test-ip":     "127.0.0.1",
+				"Authorization": "eyJhbGciOiJIUzI1NiJ9.eyJpZCI6InN5d2JoZWNuaDQ2cmhtMCIsInR5cGUiOiJhdXRoIiwiY29sbGVjdGlvbklkIjoicGJjXzMxNDI2MzU4MjMiLCJleHAiOjI1MjQ2MDQ0NjEsInJlZnJlc2hhYmxlIjp0cnVlfQ.UXgO3j-0BumcugrFjbd7j0M4MQvbrLggLlcu_YNGjoY",
+			},
+			BeforeTestFunc:  setupWhitelist(),
+			ExpectedStatus:  200,
+			ExpectedContent: []string{"test123"},
+			ExpectedEvents:  map[string]int{"*": 0},
+		},
+	}
+
+	for _, scenario := range scenarios {
+		scenario.Test(t)
+	}
+}
--- a/apis/record_helpers.go
+++ b/apis/record_helpers.go
@@ -43,6 +43,13 @@ func RecordAuthResponse(e *core.RequestEvent, authRecord *core.Record, authMetho
 }

 func recordAuthResponse(e *core.RequestEvent, authRecord *core.Record, token string, authMethod string, meta any) error {
+	if authRecord.IsSuperuser() {
+		allowedIPs := e.App.Settings().SuperuserIPs
+		if len(allowedIPs) > 0 && !isIPInList(allowedIPs, e.RealIP()) {
+			return e.ForbiddenError("", errors.New("superuser IP is not whitelisted"))
+		}
+	}
+
 	originalRequestInfo, err := e.RequestInfo()
 	if err != nil {
 		return err
--- a/apis/record_helpers_test.go
+++ b/apis/record_helpers_test.go
@@ -759,3 +759,39 @@ func TestRecordAuthResponseMFACheck(t *testing.T) {
 		}
 	})
 }
+
+func TestRecordAuthResponseSuperuserIPsWhitelistCheck(t *testing.T) {
+	app, _ := tests.NewTestApp()
+	defer app.Cleanup()
+
+	superuser, err := app.FindAuthRecordByEmail(core.CollectionNameSuperusers, "test@example.com")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	app.Settings().TrustedProxy.Headers = []string{"x-test-ip"}
+
+	event := new(core.RequestEvent)
+	event.App = app
+	event.Request = httptest.NewRequest(http.MethodGet, "/", nil)
+	event.Request.Header.Set("x-test-ip", "127.0.0.1")
+	event.Response = httptest.NewRecorder()
+
+	t.Run("non-whitelisted", func(t *testing.T) {
+		app.Settings().SuperuserIPs = []string{"0.0.0.0"}
+
+		err = apis.RecordAuthResponse(event, superuser, "example", nil)
+		if err == nil {
+			t.Fatal("Expected response error, got nil")
+		}
+	})
+
+	t.Run("whitelisted", func(t *testing.T) {
+		app.Settings().SuperuserIPs = []string{"0.0.0.0", "127.0.0.1"}
+
+		err = apis.RecordAuthResponse(event, superuser, "example", nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+	})
+}
--- a/cmd/superuser.go
+++ b/cmd/superuser.go
@@ -24,6 +24,7 @@ func NewSuperuserCommand(app core.App) *cobra.Command {
 	command.AddCommand(superuserUpdateCommand(app))
 	command.AddCommand(superuserDeleteCommand(app))
 	command.AddCommand(superuserOTPCommand(app))
+	command.AddCommand(superuserIPsCommand(app))

 	return command
 }
@@ -209,3 +210,38 @@ func superuserOTPCommand(app core.App) *cobra.Command {

 	return command
 }
+
+func superuserIPsCommand(app core.App) *cobra.Command {
+	command := &cobra.Command{
+		Use:          "ips",
+		Example:      "superuser ips 127.0.0.1 10.0.0.0/24",
+		Short:        "Updates the superuser IPs whitelist setting (the IPs/subnets arguments must be space separated; leave empty to clear the whitelist restriction)",
+		SilenceUsage: true,
+		RunE: func(command *cobra.Command, args []string) error {
+			settings := app.Settings()
+			settings.SuperuserIPs = args
+
+			if err := app.Save(settings); err != nil {
+				return err
+			}
+
+			if len(args) == 0 {
+				color.Green("Successfully cleared SuperuserIPs setting!")
+			} else {
+				color.New(color.BgGreen, color.FgBlack).Println("Successfully updated SuperuserIPs setting:")
+				superuserIPs := app.Settings().SuperuserIPs
+				for i, ip := range superuserIPs {
+					if i == len(superuserIPs)-1 {
+						color.Green("└─ %s", ip)
+					} else {
+						color.Green("├─ %s", ip)
+					}
+				}
+			}
+
+			return nil
+		},
+	}
+
+	return command
+}
--- a/cmd/superuser_test.go
+++ b/cmd/superuser_test.go
@@ -1,6 +1,7 @@
 package cmd_test

 import (
+	"slices"
 	"testing"

 	"github.com/pocketbase/pocketbase/cmd"
@@ -401,3 +402,63 @@ func TestSuperuserOTPCommand(t *testing.T) {
 		})
 	}
 }
+
+func TestSuperuserIPsCommand(t *testing.T) {
+	app, _ := tests.NewTestApp()
+	defer app.Cleanup()
+
+	scenarios := []struct {
+		name        string
+		ips         []string
+		expectError bool
+	}{
+		{
+			"no ips",
+			nil,
+			false,
+		},
+		{
+			"invalid ips",
+			[]string{"127.0.0.1", "invalid"},
+			true,
+		},
+		{
+			"valid ips",
+			[]string{"127.0.0.1", "::1", "127.0.0.1/24"},
+			false,
+		},
+	}
+
+	for _, s := range scenarios {
+		t.Run(s.name, func(t *testing.T) {
+			args := []string{"ips"}
+			args = append(args, s.ips...)
+
+			command := cmd.NewSuperuserCommand(app)
+			command.SetArgs(args)
+
+			err := command.Execute()
+
+			hasErr := err != nil
+			if s.expectError != hasErr {
+				t.Fatalf("Expected hasErr %v, got %v (%v)", s.expectError, hasErr, err)
+			}
+
+			if hasErr {
+				return
+			}
+
+			settingIPs := app.Settings().SuperuserIPs
+
+			if len(settingIPs) != len(s.ips) {
+				t.Fatalf("Expected %d ips, got %d (%v)", len(s.ips), len(settingIPs), settingIPs)
+			}
+
+			for _, ip := range settingIPs {
+				if !slices.Contains(s.ips, ip) {
+					t.Fatalf("Missing expected ip %q (%v)", ip, settingIPs)
+				}
+			}
+		})
+	}
+}
--- a/core/base.go
+++ b/core/base.go
@@ -38,8 +38,9 @@ const (

 	LocalStorageDirName       string = "storage"
 	LocalBackupsDirName       string = "backups"
-	LocalTempDirName          string = ".pb_temp_to_delete" // temp pb_data sub directory that will be deleted on each app.Bootstrap()
 	LocalAutocertCacheDirName string = ".autocert_cache"
+	LocalNotifyDirName        string = ".notify"            // optional watched directory that is used as a cross-platform workaround for synchronizing various runtime states between multiple PocketBase instances pointing to the same pb_data
+	LocalTempDirName          string = ".pb_temp_to_delete" // temp pb_data sub directory that will be deleted on each app.Bootstrap()

 	// @todo consider removing after backups refactoring
 	lostFoundDirName string = "lost+found"
@@ -1382,6 +1383,7 @@ func (app *BaseApp) registerBaseHooks() {
 	app.registerMFAHooks()
 	app.registerOTPHooks()
 	app.registerAuthOriginHooks()
+	app.registerNotifyWatcherHooks()
 }

 // getLoggerMinLevel returns the logger min level based on the
--- a/core/notify_watcher.go
+++ b/core/notify_watcher.go
@@ -0,0 +1,210 @@
+package core
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/fatih/color"
+	"github.com/fsnotify/fsnotify"
+	"github.com/pocketbase/pocketbase/tools/hook"
+	"github.com/pocketbase/pocketbase/tools/security"
+)
+
+const systemHookIdNotifyWatcher = "__pbNotifyWatcherSystemHook__"
+
+func (app *BaseApp) registerNotifyWatcherHooks() {
+	var notifyWatcher *fsnotify.Watcher
+
+	instanceId := "@" + security.PseudorandomString(10)
+
+	localNotifyDirPath := filepath.Join(app.DataDir(), LocalNotifyDirName)
+	settingsFile := filepath.Join(localNotifyDirPath, "settings"+instanceId)
+	collectionsFile := filepath.Join(localNotifyDirPath, "collections"+instanceId)
+
+	// init
+	app.OnBootstrap().Bind(&hook.Handler[*BootstrapEvent]{
+		Id: systemHookIdNotifyWatcher,
+		Func: func(e *BootstrapEvent) error {
+			err := e.Next()
+			if err != nil {
+				return err
+			}
+
+			if notifyWatcher != nil {
+				_ = notifyWatcher.Close()
+			}
+
+			notifyWatcher, err = createNotifyDirWatcher(e.App, instanceId, localNotifyDirPath)
+			if err != nil {
+				e.App.Logger().Warn("Notify dir watcher failure.", "error", err)
+			}
+
+			return nil
+		},
+		Priority: -998,
+	})
+
+	// cleanup
+	app.OnTerminate().Bind(&hook.Handler[*TerminateEvent]{
+		Id: systemHookIdNotifyWatcher,
+		Func: func(e *TerminateEvent) error {
+			if notifyWatcher != nil {
+				_ = notifyWatcher.Close()
+			}
+
+			_ = os.Remove(settingsFile)
+			_ = os.Remove(collectionsFile)
+
+			return e.Next()
+		},
+		Priority: -998,
+	})
+
+	// ---------------------------------------------------------------
+
+	settingsNotify := func(e *ModelEvent) error {
+		err := e.Next()
+		if err != nil || e.Model.PK() != paramsKeySettings {
+			return err
+		}
+
+		if notifyWatcher != nil {
+			if err := os.WriteFile(settingsFile, nil, 0644); err != nil {
+				e.App.Logger().Warn("Failed to write watcher file", "error", err, "file", settingsFile)
+			}
+			_ = os.Remove(settingsFile)
+		}
+
+		return nil
+	}
+	app.OnModelAfterCreateSuccess(paramsTable).Bind(&hook.Handler[*ModelEvent]{
+		Id:       systemHookIdNotifyWatcher,
+		Func:     settingsNotify,
+		Priority: 999,
+	})
+	app.OnModelAfterUpdateSuccess(paramsTable).Bind(&hook.Handler[*ModelEvent]{
+		Id:       systemHookIdNotifyWatcher,
+		Func:     settingsNotify,
+		Priority: 999,
+	})
+
+	// ---------------------------------------------------------------
+
+	collectionsNotify := func(e *CollectionEvent) error {
+		if err := e.Next(); err != nil {
+			return err
+		}
+
+		if notifyWatcher != nil {
+			if err := os.WriteFile(collectionsFile, nil, 0644); err != nil {
+				e.App.Logger().Warn("Failed to write watcher file", "error", err, "file", collectionsFile)
+			}
+			_ = os.Remove(collectionsFile)
+		}
+
+		return nil
+	}
+	app.OnCollectionAfterCreateSuccess().Bind(&hook.Handler[*CollectionEvent]{
+		Id:       systemHookIdNotifyWatcher,
+		Func:     collectionsNotify,
+		Priority: 999,
+	})
+	app.OnCollectionAfterUpdateSuccess().Bind(&hook.Handler[*CollectionEvent]{
+		Id:       systemHookIdNotifyWatcher,
+		Func:     collectionsNotify,
+		Priority: 999,
+	})
+	app.OnCollectionAfterDeleteSuccess().Bind(&hook.Handler[*CollectionEvent]{
+		Id:       systemHookIdNotifyWatcher,
+		Func:     collectionsNotify,
+		Priority: 999,
+	})
+}
+
+func createNotifyDirWatcher(app App, instanceId string, localNotifyDirPath string) (*fsnotify.Watcher, error) {
+	// create the notify dir (if not already)
+	err := os.MkdirAll(localNotifyDirPath, os.ModePerm)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create a notify dir: %w", err)
+	}
+
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		return nil, fmt.Errorf("failed to init notify dir watcher: %w", err)
+	}
+
+	err = watcher.Add(localNotifyDirPath)
+	if err != nil {
+		_ = watcher.Close()
+		return nil, fmt.Errorf("unable to watch notify dir: %w", err)
+	}
+
+	var debounceTimer *time.Timer
+
+	stopDebounceTimer := func() {
+		if debounceTimer != nil {
+			debounceTimer.Stop()
+			debounceTimer = nil
+		}
+	}
+
+	// watch
+	go func() {
+		defer stopDebounceTimer()
+
+		for {
+			select {
+			case event, ok := <-watcher.Events:
+				if !ok {
+					return
+				}
+
+				// modified from within the current app instance or cleanup event
+				if strings.HasSuffix(event.Name, instanceId) || event.Has(fsnotify.Remove) || !app.IsBootstrapped() {
+					continue
+				}
+
+				stopDebounceTimer()
+
+				debounceTimer = time.AfterFunc(50*time.Millisecond, func() {
+					filename := filepath.Base(event.Name)
+
+					// settings changed
+					if strings.HasPrefix(filename, "settings@") {
+						app.Logger().Debug("Reloading settings after notify event")
+
+						err := app.ReloadSettings()
+						if err != nil {
+							app.Logger().Warn("Failed to reload app settings after notify", "error", err)
+						}
+						return
+					}
+
+					// collections changed
+					if strings.HasPrefix(filename, "collections@") {
+						app.Logger().Debug("Reloading cached collections after notify event")
+
+						err := app.ReloadCachedCollections()
+						if err != nil {
+							app.Logger().Warn("Failed to reload cached collections after notify", "error", err)
+						}
+						return
+					}
+				})
+			case err, ok := <-watcher.Errors:
+				if app.IsDev() && err != nil {
+					color.Red("Notify dir watch error:", err)
+				}
+
+				if !ok {
+					return
+				}
+			}
+		}
+	}()
+
+	return watcher, err
+}
--- a/core/notify_watcher_test.go
+++ b/core/notify_watcher_test.go
@@ -0,0 +1,185 @@
+package core_test
+
+import (
+	"context"
+	"database/sql"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/pocketbase/dbx"
+	"github.com/pocketbase/pocketbase/core"
+	"github.com/pocketbase/pocketbase/tools/store"
+	"golang.org/x/sync/semaphore"
+)
+
+func TestNotifyWatcher_SettingsUpdate(t *testing.T) {
+	t.Parallel()
+
+	testEvents := store.New[core.App, int](nil)
+
+	tmpDir, err := os.MkdirTemp("", "pb_notify_test*")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	app1 := core.NewBaseApp(core.BaseAppConfig{
+		DataDir: tmpDir,
+	})
+	if err := app1.Bootstrap(); err != nil {
+		t.Fatal(err)
+	}
+
+	app2 := core.NewBaseApp(core.BaseAppConfig{
+		DataDir: tmpDir,
+	})
+	if err := app2.Bootstrap(); err != nil {
+		t.Fatal(err)
+	}
+
+	ctx, cancelCtx := context.WithTimeout(context.Background(), 1*time.Second)
+	defer cancelCtx()
+
+	sem := semaphore.NewWeighted(1)
+	sem.Acquire(ctx, 1)
+
+	app1.OnSettingsReload().BindFunc(func(e *core.SettingsReloadEvent) error {
+		testEvents.SetFunc(app1, func(old int) int {
+			return old + 1
+		})
+		return e.Next()
+	})
+
+	app2.OnSettingsReload().BindFunc(func(e *core.SettingsReloadEvent) error {
+		testEvents.SetFunc(app2, func(old int) int {
+			sem.Release(1)
+
+			return old + 1
+		})
+		return e.Next()
+	})
+
+	// updating app1 settings should trigger a reload in app2
+	app1.Settings().SuperuserIPs = []string{"127.0.0.1"}
+	if err := app1.Save(app1.Settings()); err != nil {
+		t.Fatal(err)
+	}
+
+	// block until released or timeouted
+	sem.Acquire(ctx, 1)
+
+	if app1Total := testEvents.Get(app1); app1Total != 1 {
+		t.Fatalf("Expected 1 app1 event, got %d", app1Total)
+	}
+
+	if app2Total := testEvents.Get(app2); app2Total != 1 {
+		t.Fatalf("Expected 1 app2 event, got %d", app2Total)
+	}
+
+	app2SuperuserIPs := app2.Settings().SuperuserIPs
+	if len(app2SuperuserIPs) != 1 || app2SuperuserIPs[0] != "127.0.0.1" {
+		t.Fatalf("Expected exactly 127.0.0.1 superuser IP in app2 settings event, got %v", app2SuperuserIPs)
+	}
+}
+
+func TestNotifyWatcher_CollectionsUpdate(t *testing.T) {
+	t.Parallel()
+
+	tmpDir, err := os.MkdirTemp("", "pb_notify_test*")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	app1 := core.NewBaseApp(core.BaseAppConfig{
+		DataDir: tmpDir,
+	})
+	if err := app1.Bootstrap(); err != nil {
+		t.Fatal(err)
+	}
+
+	app2 := core.NewBaseApp(core.BaseAppConfig{
+		DataDir: tmpDir,
+	})
+	if err := app2.Bootstrap(); err != nil {
+		t.Fatal(err)
+	}
+
+	testQueries := store.New[string, []string](nil)
+	app2.ConcurrentDB().(*dbx.DB).QueryLogFunc = func(ctx context.Context, t time.Duration, sql string, rows *sql.Rows, err error) {
+		testQueries.SetFunc("concurrent", func(old []string) []string {
+			return append(old, sql)
+		})
+	}
+	app2.ConcurrentDB().(*dbx.DB).ExecLogFunc = func(ctx context.Context, t time.Duration, sql string, result sql.Result, err error) {
+		testQueries.SetFunc("concurrent", func(old []string) []string {
+			return append(old, sql)
+		})
+	}
+	app2.NonconcurrentDB().(*dbx.DB).QueryLogFunc = func(ctx context.Context, t time.Duration, sql string, rows *sql.Rows, err error) {
+		testQueries.SetFunc("nonconcurrent", func(old []string) []string {
+			return append(old, sql)
+		})
+	}
+	app2.NonconcurrentDB().(*dbx.DB).ExecLogFunc = func(ctx context.Context, t time.Duration, sql string, result sql.Result, err error) {
+		testQueries.SetFunc("nonconcurrent", func(old []string) []string {
+			return append(old, sql)
+		})
+	}
+
+	ctx, cancelCtx := context.WithTimeout(context.Background(), 1*time.Second)
+	defer cancelCtx()
+
+	sem := semaphore.NewWeighted(1)
+	sem.Acquire(ctx, 1)
+
+	// currently there is no hook for the collections cache reload so we pool instead
+	done := make(chan bool, 1)
+	ticker := time.NewTicker(100 * time.Millisecond)
+	go func() {
+		for {
+			select {
+			case <-ticker.C:
+				if len(testQueries.Get("concurrent")) == 1 {
+					sem.Release(1)
+					return
+				}
+			case <-done:
+				return
+			}
+		}
+	}()
+
+	// create/update/delete app1 collections should trigger a reload in app2
+	dummyCollection := core.NewBaseCollection("test")
+	if err := app1.Save(dummyCollection); err != nil {
+		t.Fatal(err)
+	}
+	dummyCollection.Fields.Add(&core.TextField{Name: "test"})
+	if err := app1.Save(dummyCollection); err != nil {
+		t.Fatal(err)
+	}
+	if err := app1.Delete(dummyCollection); err != nil {
+	}
+
+	// block until released or timeouted
+	sem.Acquire(ctx, 1)
+	ticker.Stop()
+	done <- true
+
+	nonconcurrentQueries := testQueries.Get("nonconcurrent")
+	concurrentQueries := testQueries.Get("concurrent")
+
+	if len(nonconcurrentQueries) != 0 {
+		t.Fatalf("Expected 0 concurrent queries, got %d (%v)", len(nonconcurrentQueries), nonconcurrentQueries)
+	}
+	if len(concurrentQueries) != 1 {
+		t.Fatalf("Expected 1 concurrent query, got %d (%v)", len(concurrentQueries), concurrentQueries)
+	}
+
+	expectedQuery := "SELECT {{_collections}}.* FROM `_collections` ORDER BY `rowid` ASC"
+	if concurrentQueries[0] != expectedQuery {
+		t.Fatalf("Expected query\n%s\ngot\n%s", expectedQuery, concurrentQueries[0])
+	}
+}
--- a/core/settings_model.go
+++ b/core/settings_model.go
@@ -120,6 +120,10 @@ var (
 )

 type settings struct {
+	// SuperuserIPs defines an optional list of the superuser allowed
+	// individual IPs and subnets (in CIDR notation).
+	SuperuserIPs []string `form:"superuserIPs" json:"superuserIPs"`
+
 	SMTP         SMTPConfig         `form:"smtp" json:"smtp"`
 	Backups      BackupsConfig      `form:"backups" json:"backups"`
 	S3           S3Config           `form:"s3" json:"s3"`
@@ -253,6 +257,12 @@ func (s *Settings) DBExport(app App) (map[string]any, error) {
 	}
 	result["updated"] = now

+	// @todo remove with encoding/json/2
+	// serialize as empty array
+	if s.settings.SuperuserIPs == nil {
+		s.settings.SuperuserIPs = []string{}
+	}
+
 	encoded, err := json.Marshal(s.settings)
 	if err != nil {
 		return nil, err
@@ -280,6 +290,7 @@ func (s *Settings) PostValidate(ctx context.Context, app App) error {
 	defer s.mu.RUnlock()

 	return validation.ValidateStructWithContext(ctx, s,
+		validation.Field(&s.SuperuserIPs, validation.Each(validation.By(validators.IPOrSubnet))),
 		validation.Field(&s.Meta),
 		validation.Field(&s.Logs),
 		validation.Field(&s.SMTP),
@@ -343,6 +354,12 @@ func (s *Settings) MarshalJSON() ([]byte, error) {
 		}
 	}

+	// @todo remove with encoding/json/2
+	// serialize as empty array
+	if copy.SuperuserIPs == nil {
+		copy.SuperuserIPs = []string{}
+	}
+
 	return json.Marshal(copy)
 }

--- a/core/settings_model_test.go
+++ b/core/settings_model_test.go
@@ -84,7 +84,7 @@ func TestSettings_DBExport(t *testing.T) {
 				valueStr = string(export["value"].([]byte))
 			}

-			expected := `{"smtp":{"enabled":false,"port":0,"host":"smtp_host","username":"smtp_username","password":"","authMethod":"","tls":false,"localName":""},"backups":{"cron":"* * * * *","cronMaxKeep":0,"s3":{"enabled":true,"bucket":"","region":"","endpoint":"","accessKey":"","forcePathStyle":false}},"s3":{"enabled":false,"bucket":"","region":"","endpoint":"s3_endpoint","accessKey":"","secret":"s3_secret","forcePathStyle":false},"meta":{"accentColor":"","appName":"test_app_name","appURL":"","senderName":"","senderAddress":"","hideControls":false},"rateLimits":{"rules":[],"enabled":true},"trustedProxy":{"headers":[],"useLeftmostIP":true},"batch":{"enabled":false,"maxRequests":0,"timeout":15,"maxBodySize":0},"logs":{"maxDays":123,"minLevel":0,"logIP":false,"logAuthId":false}}`
+			expected := `{"superuserIPs":[],"smtp":{"enabled":false,"port":0,"host":"smtp_host","username":"smtp_username","password":"","authMethod":"","tls":false,"localName":""},"backups":{"cron":"* * * * *","cronMaxKeep":0,"s3":{"enabled":true,"bucket":"","region":"","endpoint":"","accessKey":"","forcePathStyle":false}},"s3":{"enabled":false,"bucket":"","region":"","endpoint":"s3_endpoint","accessKey":"","secret":"s3_secret","forcePathStyle":false},"meta":{"accentColor":"","appName":"test_app_name","appURL":"","senderName":"","senderAddress":"","hideControls":false},"rateLimits":{"rules":[],"enabled":true},"trustedProxy":{"headers":[],"useLeftmostIP":true},"batch":{"enabled":false,"maxRequests":0,"timeout":15,"maxBodySize":0},"logs":{"maxDays":123,"minLevel":0,"logIP":false,"logAuthId":false}}`
 			if valueStr != expected {
 				t.Fatalf("Expected exported settings\n%s\ngot\n%s", expected, valueStr)
 			}
@@ -180,7 +180,7 @@ func TestSettingsMarshalJSON(t *testing.T) {
 	}
 	rawStr := string(raw)

-	expected := `{"smtp":{"enabled":false,"port":0,"host":"","username":"abc","authMethod":"","tls":false,"localName":""},"backups":{"cron":"","cronMaxKeep":0,"s3":{"enabled":false,"bucket":"","region":"","endpoint":"","accessKey":"","forcePathStyle":false}},"s3":{"enabled":false,"bucket":"","region":"","endpoint":"","accessKey":"","forcePathStyle":false},"meta":{"accentColor":"","appName":"test123","appURL":"","senderName":"","senderAddress":"","hideControls":false},"rateLimits":{"rules":[],"enabled":false},"trustedProxy":{"headers":[],"useLeftmostIP":false},"batch":{"enabled":false,"maxRequests":0,"timeout":0,"maxBodySize":0},"logs":{"maxDays":0,"minLevel":0,"logIP":false,"logAuthId":false}}`
+	expected := `{"superuserIPs":[],"smtp":{"enabled":false,"port":0,"host":"","username":"abc","authMethod":"","tls":false,"localName":""},"backups":{"cron":"","cronMaxKeep":0,"s3":{"enabled":false,"bucket":"","region":"","endpoint":"","accessKey":"","forcePathStyle":false}},"s3":{"enabled":false,"bucket":"","region":"","endpoint":"","accessKey":"","forcePathStyle":false},"meta":{"accentColor":"","appName":"test123","appURL":"","senderName":"","senderAddress":"","hideControls":false},"rateLimits":{"rules":[],"enabled":false},"trustedProxy":{"headers":[],"useLeftmostIP":false},"batch":{"enabled":false,"maxRequests":0,"timeout":0,"maxBodySize":0},"logs":{"maxDays":0,"minLevel":0,"logIP":false,"logAuthId":false}}`

 	if rawStr != expected {
 		t.Fatalf("Expected\n%v\ngot\n%v", expected, rawStr)
@@ -196,6 +196,7 @@ func TestSettingsValidate(t *testing.T) {
 	s := app.Settings()

 	// set invalid settings data
+	s.SuperuserIPs = []string{"127.0.0.1", "invalid"}
 	s.Meta.AppName = ""
 	s.Logs.MaxDays = -10
 	s.SMTP.Enabled = true
@@ -217,6 +218,7 @@ func TestSettingsValidate(t *testing.T) {
 	}

 	expectations := []string{
+		`"superuserIPs":{`,
 		`"meta":{`,
 		`"logs":{`,
 		`"smtp":{`,
--- a/core/validators/file.go
+++ b/core/validators/file.go
@@ -31,7 +31,7 @@ func UploadedFileSize(maxBytes int64) validation.RuleFunc {
 				"validation_file_size_limit",
 				"Failed to upload {{.file}} - the maximum allowed file size is {{.maxSize}} bytes.",
 			).SetParams(map[string]any{
-				"file":    v.OriginalName,
+				"file":    cutStr(v.OriginalName, 300),
 				"maxSize": maxBytes,
 			})
 		}
@@ -60,7 +60,7 @@ func UploadedFileMimeType(validTypes []string) validation.RuleFunc {

 		baseErr := validation.NewError(
 			"validation_invalid_mime_type",
-			fmt.Sprintf("Failed to upload %q due to unsupported file type.", v.OriginalName),
+			fmt.Sprintf("Failed to upload %q due to unsupported file type.", cutStr(v.OriginalName, 300)),
 		)

 		if len(validTypes) == 0 {
--- a/core/validators/string.go
+++ b/core/validators/string.go
@@ -1,6 +1,7 @@
 package validators

 import (
+	"net/netip"
 	"regexp"

 	validation "github.com/go-ozzo/ozzo-validation/v4"
@@ -27,3 +28,30 @@ func IsRegex(value any) error {

 	return nil
 }
+
+// IPOrSubnet checks whether the validated value is an individual
+// IPv4/IPv6 or CIDR subnet.
+func IPOrSubnet(value any) error {
+	v, ok := value.(string)
+	if !ok {
+		return ErrUnsupportedValueType
+	}
+
+	if v == "" {
+		return nil // nothing to check
+	}
+
+	// subnet
+	_, err := netip.ParsePrefix(v)
+	if err == nil {
+		return nil
+	}
+
+	// individual IP
+	_, err = netip.ParseAddr(v)
+	if err == nil {
+		return nil
+	}
+
+	return validation.NewError("validation_invlaid_ip_or_subnet", "invalid IP or CIDR subnet")
+}
--- a/core/validators/string_test.go
+++ b/core/validators/string_test.go
@@ -31,3 +31,32 @@ func TestIsRegex(t *testing.T) {
 		})
 	}
 }
+
+func TestIPOrSubnet(t *testing.T) {
+	t.Parallel()
+
+	scenarios := []struct {
+		val         string
+		expectError bool
+	}{
+		{"", false},
+		{`invalid`, true},
+		{`127.0`, true}, // incomplete
+		{`127.0.0.1`, false},
+		{`::1`, false},
+		{`0000:0000:0000:0000:0000:0000:0000:0001`, false},
+		{`127.0.0.1/24`, false},
+		{`::/128`, false},
+	}
+
+	for i, s := range scenarios {
+		t.Run(fmt.Sprintf("%d_%#v", i, s.val), func(t *testing.T) {
+			err := validators.IPOrSubnet(s.val)
+
+			hasErr := err != nil
+			if hasErr != s.expectError {
+				t.Fatalf("Expected hasErr to be %v, got %v (%v)", s.expectError, hasErr, err)
+			}
+		})
+	}
+}
--- a/core/validators/validators.go
+++ b/core/validators/validators.go
@@ -38,3 +38,10 @@ func JoinValidationErrors(errA, errB error) error {

 	return errors.Join(errA, errB)
 }
+
+func cutStr(str string, max int) string {
+	if len(str) > max {
+		return str[:max] + "..."
+	}
+	return str
+}
--- a/ui/.env
+++ b/ui/.env
@@ -1,14 +1,15 @@
 # all environments should start with 'PB_' prefix
-PB_BACKEND_URL         = "../"
-PB_MFA_DOCS            = "https://pocketbase.io/docs/authentication#multi-factor-authentication"
-PB_OAUTH2_DOCS         = "https://pocketbase.io/docs/authentication#authenticate-with-oauth2"
-PB_RULES_SYNTAX_DOCS   = "https://pocketbase.io/docs/api-rules-and-filters"
-PB_FILE_UPLOAD_DOCS    = "https://pocketbase.io/docs/files-handling"
-PB_PROTECTED_FILE_DOCS = "https://pocketbase.io/docs/files-handling#protected-files"
-PB_REALTIME_DOCS       = "https://pocketbase.io/docs/api-realtime/"
-PB_FIELDS_DOCS         = "https://pocketbase.io/docs/collections/#fields"
-PB_DOCS_URL            = "https://pocketbase.io/docs"
-PB_JS_SDK_URL          = "https://github.com/pocketbase/js-sdk"
-PB_DART_SDK_URL        = "https://github.com/pocketbase/dart-sdk"
-PB_RELEASES            = "https://github.com/pocketbase/pocketbase/releases"
-PB_VERSION             = "v0.37.6-dev"
+PB_BACKEND_URL              = "../"
+PB_MFA_DOCS                 = "https://pocketbase.io/docs/authentication#multi-factor-authentication"
+PB_OAUTH2_DOCS              = "https://pocketbase.io/docs/authentication#authenticate-with-oauth2"
+PB_RULES_SYNTAX_DOCS        = "https://pocketbase.io/docs/api-rules-and-filters"
+PB_FILE_UPLOAD_DOCS         = "https://pocketbase.io/docs/files-handling"
+PB_PROTECTED_FILE_DOCS      = "https://pocketbase.io/docs/files-handling#protected-files"
+PB_REALTIME_DOCS            = "https://pocketbase.io/docs/api-realtime/"
+PB_FIELDS_DOCS              = "https://pocketbase.io/docs/collections/#fields"
+PB_SUPERUSER_IPS_RESET_DOCS = "https://pocketbase.io/docs/going-to-production/#limit-superusers-to-specific-ipssubnets"
+PB_DOCS_URL                 = "https://pocketbase.io/docs"
+PB_JS_SDK_URL               = "https://github.com/pocketbase/js-sdk"
+PB_DART_SDK_URL             = "https://github.com/pocketbase/dart-sdk"
+PB_RELEASES                 = "https://github.com/pocketbase/pocketbase/releases"
+PB_VERSION                  = "v0.37.6-dev"
--- a/ui/dist/assets/index-B5eik2f8.js
+++ b/ui/dist/assets/index-B5eik2f8.js
--- a/ui/dist/assets/index-ZC1aK-6Z.css
+++ b/ui/dist/assets/index-ZC1aK-6Z.css
--- a/ui/dist/index.html
+++ b/ui/dist/index.html
@@ -13,9 +13,9 @@

    <!-- prism -->
    <script src="./libs/prism/prism.js" data-manual></script>
-  <script type="module" crossorigin src="./assets/index-CsbGEmKA.js"></script>
+  <script type="module" crossorigin src="./assets/index-B5eik2f8.js"></script>
  <link rel="modulepreload" crossorigin href="./assets/pocketbase.es-B_4DUNUU.js">
-  <link rel="stylesheet" crossorigin href="./assets/index-e0-DEGQo.css">
+  <link rel="stylesheet" crossorigin href="./assets/index-ZC1aK-6Z.css">
 </head>
 <body>
 </body>
--- a/ui/src/collections/collectionUpsertModal.js
+++ b/ui/src/collections/collectionUpsertModal.js
@@ -832,7 +832,7 @@ function deleteDropdownItem(data, modalSettings) {
        try {
            await app.pb.collections.delete(data.originalCollection.name);

-            modalSettings.ondelete?.(JSON.parse(JSON.stringify(data.originalCollection)));
+            modalSettings?.ondelete?.(JSON.parse(JSON.stringify(data.originalCollection)));

            app.utils.removeByKey(app.store.collections, "id", data.originalCollection.id);

--- a/ui/src/css/base.css
+++ b/ui/src/css/base.css
@@ -513,7 +513,9 @@ hr {
    text-decoration: none;
    border-radius: var(--borderRadius);
    color: var(--linkColor);
-    transition: color var(--animationSpeed);
+    transition:
+        color var(--animationSpeed),
+        opacity var(--animationSpeed);
    user-select: none;
    &:hover,
    &:focus-visible {
--- a/ui/src/pb.js
+++ b/ui/src/pb.js
@@ -235,12 +235,4 @@ window.app.checkApiError = function(err, showToast = true) {
        app.pb.cancelAllRequests();
        return app.pb.authStore.clear();
    }
-
-    // forbidden
-    if (statusCode === 403) {
-        app.pb.cancelAllRequests();
-        if (window.location.hash != LOGIN_PATH) {
-            window.location.hash = LOGIN_PATH;
-        }
-    }
 };
--- a/ui/src/settings/application/batchAccordion.js
+++ b/ui/src/settings/application/batchAccordion.js
@@ -8,7 +8,7 @@ export function batchAccordion(pageData) {
        t.summary(
            null,
            t.i({ className: "ri-archive-stack-line", ariaHidden: true }),
-            t.span({ className: "txt" }, "Batch API"),
+            t.span({ className: "txt" }, "Batch Web API"),
            t.div({ className: "flex-fill" }),
            () => {
                if (pageData.formSettings.batch.enabled) {
--- a/ui/src/settings/application/pageApplicationSettings.js
+++ b/ui/src/settings/application/pageApplicationSettings.js
@@ -1,6 +1,7 @@
 import { settingsSidebar } from "../settingsSidebar";
 import { batchAccordion } from "./batchAccordion";
 import { rateLimitAccordion, sortRules } from "./rateLimitAccordion";
+import { superuserAccordion } from "./superuserAccordion";
 import { trustedProxyAccordion } from "./trustedProxyAccordion";

 export function pageApplicationSettings() {
@@ -37,6 +38,53 @@ export function pageApplicationSettings() {
        }
    }

+    function hasSuperuserIPsChanged() {
+        return JSON.stringify(data.formSettings?.superuserIPs)
+            != JSON.stringify(data.originalFormSettings?.superuserIPs);
+    }
+
+    async function saveWithConfirm() {
+        const superuserIPs = app.utils.toArray(data.formSettings?.superuserIPs);
+
+        if (!superuserIPs.length) {
+            return save();
+        }
+
+        return app.modals.confirm(
+            t.div(
+                { className: "txt-center" },
+                t.h6(
+                    null,
+                    "The ONLY allowed superuser IPs will change to: ",
+                    t.br(),
+                    t.strong(null, superuserIPs.join(", ")),
+                ),
+                t.p(null, "Please make sure that your IP is in the list or you'll be locked."),
+                t.p(
+                    { className: "txt-hint" },
+                    "In case of lockout, you can reset the setting with the ",
+                    t.a(
+                        {
+                            href: import.meta.env.PB_SUPERUSER_IPS_RESET_DOCS,
+                            target: "_blank",
+                            rel: "noopener noreferrer",
+                            className: "link-primary txt-bold txt-sm",
+                        },
+                        t.code(
+                            null,
+                            "superuser ips",
+                            t.i({ ariaHidden: true, className: "ri-arrow-right-up-line txt-sm" }),
+                        ),
+                    ),
+                    " console command.",
+                ),
+            ),
+            () => save(),
+            null,
+            { yesButton: "Yes, save changes" },
+        );
+    }
+
    async function save() {
        if (data.isSaving || !data.hasChanges) {
            return;
@@ -48,8 +96,19 @@ export function pageApplicationSettings() {

        try {
            const redacted = app.utils.filterRedactedProps(data.formSettings);
-            const settings = await app.pb.settings.update(redacted);
-            init(settings);
+
+            const updatedSettings = await app.pb.settings.update(redacted);
+
+            // reauthenticate to ensure that the superuser has still access
+            if (hasSuperuserIPsChanged()) {
+                try {
+                    await app.pb.collection("_superusers").authRefresh();
+                } catch (_) {
+                    app.pb.authStore.clear();
+                }
+            }
+
+            init(updatedSettings);

            app.toasts.success("Successfully saved application settings.");
        } catch (err) {
@@ -73,6 +132,7 @@ export function pageApplicationSettings() {
        }

        data.originalFormSettings = {
+            superuserIPs: settings.superuserIPs || [],
            meta: settings.meta || {},
            batch: settings.batch || {},
            trustedProxy: settings.trustedProxy || { headers: [] },
@@ -118,7 +178,7 @@ export function pageApplicationSettings() {
                            inert: () => data.isSaving,
                            onsubmit: (e) => {
                                e.preventDefault();
-                                save();
+                                saveWithConfirm();
                            },
                        },
                        t.div(
@@ -158,9 +218,10 @@ export function pageApplicationSettings() {
                        ),
                        t.div(
                            { className: "col-lg-12" },
+                            () => batchAccordion(data),
                            () => trustedProxyAccordion(data),
                            () => rateLimitAccordion(data),
-                            () => batchAccordion(data),
+                            () => superuserAccordion(data),
                        ),
                        t.div(
                            { className: "col-lg-12" },
--- a/ui/src/settings/application/rateLimitAccordion.js
+++ b/ui/src/settings/application/rateLimitAccordion.js
@@ -249,7 +249,6 @@ export function rateLimitAccordion(pageData) {
                    t.label(
                        { htmlFor: "rateLimits.enabled" },
                        t.span({ className: "txt" }, "Enable"),
-                        t.small({ className: "txt-hint" }, " (experimental)"),
                    ),
                ),
            ),
--- a/ui/src/settings/application/superuserAccordion.js
+++ b/ui/src/settings/application/superuserAccordion.js
@@ -0,0 +1,158 @@
+export function superuserAccordion(pageData) {
+    const info = store({
+        isLoading: false,
+        realIP: "",
+    });
+
+    async function loadInfo() {
+        info.isLoading = true;
+
+        try {
+            const health = await app.pb.health.check({ requestKey: "loadSuperuserIPsInfo" });
+
+            info.realIP = health.data?.realIP || "";
+            info.isLoading = false;
+        } catch (err) {
+            if (!err.isAbort) {
+                app.checkApiError(err);
+                info.isLoading = false;
+            }
+        }
+    }
+
+    return t.details(
+        {
+            pbEvent: "superuserAccordion",
+            className: "accordion superuser-accordion",
+            name: "settingsAccordion",
+            onmount: (el) => {
+                el._ipwatcher?.unwatch();
+                el._ipwatcher = watch(
+                    () => JSON.stringify(app.store.settings?.trustedProxy?.headers),
+                    (newHash, oldHash) => {
+                        if (newHash != oldHash) {
+                            loadInfo();
+                        }
+                    },
+                );
+            },
+            onunmount: (el) => {
+                el._ipwatcher?.unwatch();
+            },
+        },
+        t.summary(
+            null,
+            t.i({ className: "ri-fingerprint-2-line", ariaHidden: true }),
+            t.span({ className: "txt" }, "Superuser IPs"),
+            t.div({ className: "flex-fill" }),
+            () => {
+                if (pageData.formSettings?.superuserIPs?.length) {
+                    return t.span({ className: "label success" }, "Enabled");
+                }
+                return t.span({ className: "label" }, "Disabled");
+            },
+            () => {
+                if (!app.utils.isEmpty(app.store.errors?.batch)) {
+                    return t.i({
+                        className: "ri-error-warning-fill txt-danger",
+                        ariaDescription: app.attrs.tooltip("Has errors", "left"),
+                    });
+                }
+            },
+        ),
+        t.div(
+            { className: "content m-b-sm" },
+            t.p(null, "A comma separated list of superusers allowed IPs and subnets."),
+            t.p(
+                null,
+                "Enabling this option greatly helps hardening the security of your application because even if someone manage to get their hands on a superuser auth token they will not be able to use it.",
+            ),
+            t.p(
+                null,
+                "In case your IP changes, you can always reset the field value with the ",
+                t.a(
+                    {
+                        href: import.meta.env.PB_SUPERUSER_IPS_RESET_DOCS,
+                        target: "_blank",
+                        rel: "noopener noreferrer",
+                        className: "link-primary txt-bold txt-sm",
+                    },
+                    t.code(
+                        null,
+                        "superuser ips",
+                        t.i({ ariaHidden: true, className: "ri-arrow-right-up-line txt-sm" }),
+                    ),
+                ),
+                " console command.",
+            ),
+        ),
+        t.div(
+            { className: "fields" },
+            t.div(
+                { className: "field" },
+                t.label(
+                    { htmlFor: "superuserIPs" },
+                    t.span({ className: "txt" }, "Superuser IPs and subnets"),
+                ),
+                t.input({
+                    id: "superuserIPs",
+                    name: "superuserIPs",
+                    type: "text",
+                    placeholder: "Leave empty for no restriction",
+                    value: () => app.utils.joinNonEmpty(pageData.formSettings.superuserIPs),
+                    oninput: (e) => {
+                        const newValue = app.utils.splitNonEmpty(e.target.value, ",");
+                        const newStr = app.utils.joinNonEmpty(newValue);
+                        const oldStr = app.utils.joinNonEmpty(pageData.formSettings.superuserIPs);
+
+                        // has an actual change
+                        if (oldStr != newStr) {
+                            pageData.formSettings.superuserIPs = newValue;
+                        }
+                    },
+                }),
+            ),
+            t.div(
+                { className: "field addon" },
+                t.button(
+                    {
+                        type: "button",
+                        className: () =>
+                            `btn sm secondary transparent ${
+                                app.utils.isEmpty(pageData.formSettings.superuserIPs) ? "hidden" : ""
+                            }`,
+                        onclick: () => {
+                            pageData.formSettings.superuserIPs = [];
+
+                            if (app.store.errors?.superuserIPs) {
+                                delete app.store.errors.superuserIPs;
+                            }
+                        },
+                    },
+                    t.span({ className: "txt" }, "Clear"),
+                ),
+            ),
+        ),
+        t.div(
+            { className: "field-help" },
+            "Comma separated list of IPs and subnets such as: ",
+            t.div(
+                { className: "inline-flex gap-5" },
+                t.div({
+                    role: "button",
+                    className: "label sm link-primary",
+                    onclick: () => {
+                        if (info.isLoading) {
+                            return;
+                        }
+
+                        const ips = app.utils.toArray(pageData.formSettings.superuserIPs);
+                        app.utils.pushUnique(ips, info.realIP);
+                        pageData.formSettings.superuserIPs = ips;
+                    },
+                    textContent: () => info.isLoading ? "..." : (info.realIP + " (you)"),
+                }),
+            ),
+        ),
+    );
+}
--- a/ui/src/store.js
+++ b/ui/src/store.js
@@ -375,7 +375,20 @@ watch(

            removeErrorState(input, container);

-            const errMsg = app.utils.getByPath(errs, name)?.message;
+            const errData = app.utils.getByPath(errs, name);
+            let errMsg = errData?.message || "";
+
+            // merge one level nested errors into a single message
+            if (!errMsg && !app.utils.isEmpty(errData)) {
+                const combinedErrs = [];
+                for (let key in errData) {
+                    if (errData[key]?.message) {
+                        combinedErrs.push(`${key}: ${errData[key]?.message}`);
+                    }
+                }
+                errMsg = combinedErrs.join("\n");
+            }
+
            if (!errMsg) {
                continue;
            }