diff --git a/.changeset/odd-trams-make.md b/.changeset/odd-trams-make.md
new file mode 100644
index 0000000000..2bad8c8a98
--- /dev/null
+++ b/.changeset/odd-trams-make.md
@@ -0,0 +1,6 @@
+---
+"@pnpm/fetch": patch
+"pnpm": patch
+---
+
+When making requests for the non-abbreviated packument, add `*/*` to the `Accept` header to avoid getting a 406 error on AWS CodeArtifact [#9862](https://github.com/pnpm/pnpm/issues/9862).
diff --git a/cspell.json b/cspell.json
index 3c5a4a0b5f..0fc022649b 100644
--- a/cspell.json
+++ b/cspell.json
@@ -164,6 +164,7 @@
     "outfile",
     "overrider",
     "packlist",
+    "packument",
     "paralleljs",
     "parallelly",
     "parseable",
diff --git a/network/fetch/src/fetchFromRegistry.ts b/network/fetch/src/fetchFromRegistry.ts
index 733313603a..3f23b5814f 100644
--- a/network/fetch/src/fetchFromRegistry.ts
+++ b/network/fetch/src/fetchFromRegistry.ts
@@ -6,8 +6,12 @@ import { fetch, isRedirect, type Response, type RequestInfo, type RequestInit }
 
 const USER_AGENT = 'pnpm' // or maybe make it `${pkg.name}/${pkg.version} (+https://npm.im/${pkg.name})`
 
-const ABBREVIATED_DOC = 'application/vnd.npm.install-v1+json; q=1.0, application/json; q=0.8, */*'
-const JSON_DOC = 'application/json'
+const FULL_DOC = 'application/json'
+const ACCEPT_FULL_DOC = `${FULL_DOC}; q=1.0, */*`
+
+const ABBREVIATED_DOC = 'application/vnd.npm.install-v1+json'
+const ACCEPT_ABBREVIATED_DOC = `${ABBREVIATED_DOC}; q=1.0, ${FULL_DOC}; q=0.8, */*`
+
 const MAX_FOLLOWED_REDIRECTS = 20
 
 export interface FetchWithAgentOptions extends RequestInit {
@@ -102,7 +106,7 @@ function getHeaders (
   }
 ): Headers {
   const headers: { accept: string, authorization?: string, 'user-agent'?: string } = {
-    accept: opts.fullMetadata === true ? JSON_DOC : ABBREVIATED_DOC,
+    accept: opts.fullMetadata === true ? ACCEPT_FULL_DOC : ACCEPT_ABBREVIATED_DOC,
   }
   if (opts.auth) {
     headers['authorization'] = opts.auth