CVE Watch11 de nov. de 2026

CVE-2026-123872

A client certificate authentication bypass in Node.js TLS lets a client change the servername during TLS 1.2 renegotiation to reach endpoint

CVSS

8.1

Alta

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 11 de nov. de 2026 · Última mod.: 11 de nov. de 2026 · CWE-287

EPSS · 30d

Ainda não há histórico EPSS suficiente.

Descrição técnica

A client certificate authentication bypass in Node.js TLS lets a client change the servername during TLS 1.2 renegotiation to reach endpoints it was not authorized for. On a server that applies different client-certificate policies per hostname, for example stricter admin-only client-cert auth on one host and ordinary client-cert auth on another, a client that authenticates for a permitted host can renegotiate the TLS 1.2 connection under a different servername and carry its existing authentication to the protected host, bypassing the stricter policy. This vulnerability affects Node.js 26.x, 24.x, and 22.x.

Referências oficiais

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