PT-2026-63558 · Npm · Next

CVE-2026-64643 · Publicado 2026-07-22 · Atualizado 2026-07-22

OSV

CVSS v4.0

6.3

Média

Vetor base

AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

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 example, static chunks containing action references).

Affected users are applications using App Router + Server Actions.

By itself, this disclosure is typically a recon/enumeration primitive; however, it can increase risk when combined with other weaknesses.

Workarounds

Never assume any authentication claims at the use cache or use server boundary. Always authenticate within the boundary.

Correção

Enumeração de Fraquezas

CWE-201

Identificadores relacionados

CVE-2026-64643

GHSA-955P-X3MX-JCVP

Produtos afetados

Next

Referências · 7

• https://github.com/vercel/next.js/commit/ff12a6124e1504f17b62de948b8a553fdecaef7b · Nota
• https://github.com/vercel/next.js/releases/tag/v16.2.11 · Nota
• https://github.com/vercel/next.js · Nota
• https://github.com/vercel/next.js/security/advisories/GHSA-955p-x3mx-jcvp · Nota
• https://github.com/vercel/next.js/commit/1b0c3ae912a3ad925c60065cc8d55b070fa8bcd3 · Nota
• https://github.com/vercel/next.js/releases/tag/v15.5.21 · Nota
• https://osv.dev/vulnerability/GHSA-955p-x3mx-jcvp · Aviso do Fabricante