---
id: CVE-2026-105482
title: >-
  nodejs: nodejs: dns.resolve truncates hostnames containing a NUL character
  (CVE-2026-105482)
summary: >-
  A flaw was found in the Node.js DNS resolver APIs. Hostnames passed to
  dns.resolve that contain an embedded NUL character can be truncated when
  processed by c-ares. An attacker who can supply such a name may cause the
  application to resolv…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cvssSource: vendor
cwe:
  - CWE-158
  - CWE-284
vendor: Red Hat
product: Red Hat Enterprise Linux 8
affected:
  - enterprise_linux 10
  - enterprise_linux 8
  - enterprise_linux 9
published: '2026-10-21'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T18:19:21+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-105482.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-105482.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-105482'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2559875'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-105482'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105482'
  - url: 'https://nodejs.org/en/blog/release/v22.23.4'
  - url: 'https://nodejs.org/en/blog/vulnerability/october-2026-security-releases'
tags:
  - csaf
  - vex
  - red-hat
  - exploit-available
  - cve.org
exploits:
  github: 2
  githubRepos:
    - 'https://github.com/CaterMaoZi/CVE-2026-105482-POC'
    - 'https://github.com/completetech-security/node-cve-2026-105482-check'
  checkedAt: '2026-10-24T12:26:10.186Z'
exploitAvailable: true
ingestedAt: '2026-10-23T16:31:11.318Z'
---

## Overview

A flaw was found in the Node.js DNS resolver APIs. Hostnames passed to dns.resolve that contain an embedded NUL character can be truncated when processed by c-ares. An attacker who can supply such a name may cause the application to resolve and act on an unintended hostname.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-105482.json)

**nodejs: nodejs: dns.resolve truncates hostnames containing a NUL character** — rated Important by Red Hat. Released 2026-10-21, updated 2026-10-23.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9

Not affected:

- Red Hat Hardened Images

## Remediation

Affected

Workarounds / mitigations:

- To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.