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6.3 Medium

CVE-2026-64643 Next.js is a React framework for building full-stack web applications

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.

Affected products and versions

Product Affected versions Fixed in
next.js 16.0 16.0.0 → < 16.2.11 16.2.11
next.js 13.0 13.0.0 → < 15.5.21 15.5.21

References

Timeline

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Other CVEs of next.js

The 57 CVEs of next.js →
CVE-2026-94482 Next.js is a React framework for building full-stack web applications 8.2 High CVE-2026-94484 Next.js is a React framework for building full-stack web applications 6.3 Medium CVE-2026-94485 Next.js is a React framework for building full-stack web applications 6.3 Medium CVE-2026-94483 Next.js is a React framework for building full-stack web applications 8.3 High
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