Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, Next.js applications using App Router, Server Actions (use server) or use cache endpoints can be disclosed bypassing any authentication on the pages where these endpoints are usually used. Server Action IDs can be disclosed to unauthenticated users via publicly served client artifacts (for example, static chunks containing action references). Affected users are applications using App Router and Server Actions. By itself, this disclosure is typically a recon/enumeration primitive; however, it can increase risk when combined with other weaknesses. This issue has been fixed in versions 15.5.21 and 16.2.11.
Project Subscriptions
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Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-955p-x3mx-jcvp | Next.js: Unauthenticated disclosure of internal Server Function endpoints |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Tue, 28 Jul 2026 03:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Vercel
Vercel next.js |
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| Vendors & Products |
Vercel
Vercel next.js |
Mon, 27 Jul 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, Next.js applications using App Router, Server Actions (use server) or use cache endpoints can be disclosed bypassing any authentication on the pages where these endpoints are usually used. Server Action IDs can be disclosed to unauthenticated users via publicly served client artifacts (for example, static chunks containing action references). Affected users are applications using App Router and Server Actions. By itself, this disclosure is typically a recon/enumeration primitive; however, it can increase risk when combined with other weaknesses. This issue has been fixed in versions 15.5.21 and 16.2.11. | |
| Title | Next.js: Unauthenticated Disclosure of Internal Server Function endpoints | |
| Weaknesses | CWE-201 | |
| References |
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| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-27T18:21:55.549Z
Reserved: 2026-07-20T17:11:30.895Z
Link: CVE-2026-64643
Updated: 2026-07-27T18:21:51.553Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-28T02:45:16Z
Weaknesses
Github GHSA