CVE-2026-105482

CVE Details

Release Date:	2026-10-23
Impact:	Important	What is this?

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.

See more information about CVE-2026-105482 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.4
Vector String:	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Version:	3.1
Attack Vector:	Network
Attack Complexity:	High
Privileges Required:	None
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (nodejs)	ELSA-2026-92376	2026-10-30
Oracle Linux version 8 (nodejs-nodemon)	ELSA-2026-92376	2026-10-30
Oracle Linux version 8 (nodejs-packaging)	ELSA-2026-92376	2026-10-30
Oracle Linux version 9 (nodejs)	ELSA-2026-92378	2026-10-30
Oracle Linux version 9 (nodejs-nodemon)	ELSA-2026-92378	2026-10-30
Oracle Linux version 9 (nodejs-packaging)	ELSA-2026-92378	2026-10-30