CVE-2026-123872

Sin historial EPSS suficiente todavía.

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.

• cna.openjsf.orghttps://cna.openjsf.org/security-advisories.html
• nodejs.orghttps://nodejs.org/en/blog/vulnerability/november-2026-security-releases