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CVE Watch23 oct 2026

CVE-2026-105482

A flaw in Node.js DNS resolution allows hostnames containing a NUL byte to be silently truncated by the dns.resolve*() functions and dns.rev

CVSS

7.4

Alto

EPSS

—

KEV

—

Exploit Today

—

0-100

Publicado: 23 oct 2026 · Última mod.: 23 oct 2026 · CWE-284

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

A flaw in Node.js DNS resolution allows hostnames containing a NUL byte to be silently truncated by the dns.resolve*() functions and dns.reverse(). This is an incomplete fix of CVE-2026-48930, which only covered dns.lookup() and the net/tls host options. Because the name is passed to c-ares as a C string, resolving attacker.example\0.trusted.example queries attacker.example and returns its records without any error. Applications that validate a hostname, for example against a domain allowlist, and then resolve it with dns.resolve*() can act on records for a different name than the one they validated. This vulnerability affects Node.js 26.x, 24.x, and 22.x.

Referencias oficiales

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

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