CVE-2026-105482

HighCVSS 7.4/10Last modified Nov 2, 2026

Description

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.

Metrics

CVSS 3.0 7.4/10CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-284

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
nodejs	node	>= 22.23.3, <= 22.23.3; >= 24.22.0, <= 24.22.0; >= 26.12.0, <= 26.12.0

References

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

Timeline

Published: Oct 23, 2026
Last modified: Nov 2, 2026
NVD status: Awaiting Analysis

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