CVE-2026-64643

CVE-2026-64643 affects Next.js (versions 12.0.0–15.5.20 and 16.0.0–16.2.10) where apps using App Router, Server Actions (use server) or cache endpoints can disclose internal Server Action IDs and endpoints to unauthenticated users via publicly served client artifacts. This disclosure allows unaut...

Next.js: Unauthenticated disclosure of internal Server Function endpoints

Impact In 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...