CVE-2026-105482

Name	CVE-2026-105482
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1151688, 1151859

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
nodejs (PTS)	bookworm	18.20.4+dfsg-1~deb12u2	vulnerable
	bookworm (security)	18.20.4+dfsg-1~deb12u3	vulnerable
	trixie	20.19.2+dfsg-1+deb13u2	vulnerable
	trixie (security)	20.19.2+dfsg-1+deb13u3	vulnerable
	forky, sid	24.22.2+dfsg+~cs24.19.2-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
nodejs	source	(unstable)	24.22.1+dfsg+~cs24.19.2-1			1151688, 1151859

Notes

https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#dnsresolve-truncates-names-containing-nul-char-cve-2026-105482---high
Fixed by: https://github.com/nodejs/node/commit/19c505600222626bb1457a723418b2b8f9d6c400 (v22.23.4)