CVE Watch2 de nov. de 2026

CVE-2026-106069

A flaw in Node.js TLS hostname verification can cause a server certificate to be validated against a different IP address than the one the c

CVSS

7.4

Alta

EPSS

0.3%

p23

KEV

—

Exploit Today

0-100

Publicado: 23 de out. de 2026 · Última mod.: 2 de nov. de 2026 · CWE-295

EPSS · 30d

0.3%EPSS · 30 dias0.3%

2026-10-252026-11-07

Descrição técnica

A flaw in Node.js TLS hostname verification can cause a server certificate to be validated against a different IP address than the one the client connected to, when the host is a non-canonical IPv4 literal with a leading zero, such as `0127.0.0.1`. `tls.checkServerIdentity()` normalizes the host following the WHATWG URL rules, which read a leading-zero octet as octal (`0127.0.0.1` becomes `87.0.0.1`), while the connection is made through the operating system resolver, which on some platforms such as macOS reads it as decimal (`127.0.0.1`). A server at the connected address can then be authenticated with a certificate issued for another IP address. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

Referências oficiais

nodejs.orghttps://nodejs.org/en/blog/vulnerability/october-2026-security-releases

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