diff --git a/packages/insomnia-smoke-test/tests/smoke/cookie-editor-interactions.test.ts b/packages/insomnia-smoke-test/tests/smoke/cookie-editor-interactions.test.ts
index 01731f5777..2a9760f81a 100644
--- a/packages/insomnia-smoke-test/tests/smoke/cookie-editor-interactions.test.ts
+++ b/packages/insomnia-smoke-test/tests/smoke/cookie-editor-interactions.test.ts
@@ -59,6 +59,33 @@ test.describe('Cookie editor', () => {
     await expect.soft(page.getByText('foo2=bar2')).toBeVisible();
   });
 
+  test('support __Host- prefix', async ({ page }) => {
+    // Open cookie editor
+    await page.click('button:has-text("Cookies")');
+
+    // Create a new cookie
+    await page.getByRole('button', { name: 'Add Cookie' }).click();
+
+    // Edit the new cookie
+    await page.getByRole('button', { name: 'Edit' }).first().click();
+    await page.getByText('HostOnly').click();
+    await expect.soft(page.locator('input[name="hostOnly"]')).toBeChecked();
+    await page.getByRole('tab', { name: 'Raw' }).click();
+    await page
+      .locator('text=Raw Cookie String >> input[type="text"]')
+      .fill('__Host-foo=bar; Expires=Tue, 19 Jan 2038 03:14:07 GMT; Secure; Domain=localhost; Path=/');
+    await page.locator('text=Done').nth(1).click();
+    await page.click('text=Done');
+
+    // Send request
+    await page.getByLabel('Request Collection').getByTestId('example http').press('Enter');
+    await page.click('[data-testid="request-pane"] button:has-text("Send")');
+
+    // Check in the timeline that the cookie was sent
+    await page.getByRole('tab', { name: 'Console' }).click();
+    await expect.soft(page.getByText('__Host-foo=bar')).toBeVisible();
+  });
+
   test('cookie list should update when cookie is updated', async ({ page }) => {
     // Open cookie editor
     await page.click('button:has-text("Cookies")');
diff --git a/packages/insomnia/src/ui/components/modals/cookies-modal.tsx b/packages/insomnia/src/ui/components/modals/cookies-modal.tsx
index f24f5cc966..a6b1844349 100644
--- a/packages/insomnia/src/ui/components/modals/cookies-modal.tsx
+++ b/packages/insomnia/src/ui/components/modals/cookies-modal.tsx
@@ -525,7 +525,19 @@ const CookieModifyModal = ({ cookie, isOpen, setIsOpen, onUpdateCookie }: Cookie
                               defaultChecked={editCookie.httpOnly || false}
                               onChange={event => setEditCookie({ ...editCookie, httpOnly: event.target.checked })}
                             />
-                            httpOnly
+                            HttpOnly
+                          </label>
+                        </div>
+                        <div className="grid w-full grid-cols-2 gap-2">
+                          <label className="flex items-center gap-1">
+                            <input
+                              className="space-left"
+                              type="checkbox"
+                              name="hostOnly"
+                              defaultChecked={editCookie.hostOnly || false}
+                              onChange={event => setEditCookie({ ...editCookie, hostOnly: event.target.checked })}
+                            />
+                            HostOnly
                           </label>
                         </div>
                       </TabPanel>
@@ -540,8 +552,9 @@ const CookieModifyModal = ({ cookie, isOpen, setIsOpen, onUpdateCookie }: Cookie
                                   // NOTE: Perform toJSON so we have a plain JS object instead of Cookie instance
                                   const parsed = ToughCookie.parse(event.target.value, { loose: true })?.toJSON();
                                   if (parsed) {
-                                    // Make sure cookie has an id
+                                    // Make sure cookie has an id and keep its host-only-flag
                                     parsed.id = editCookie.id;
+                                    parsed.hostOnly = editCookie.hostOnly;
                                     setEditCookie(parsed as Cookie);
                                   }
                                 } catch (err) {