Input validation error in Node.js - CVE-2026-58042
Published: July 29, 2026 / Updated: July 29, 2026
Vulnerability identifier: #VU140044
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-58042
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Affected software:
Node.js
Node.js
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input handling in dns.resolveAny() when processing DNS responses containing more than 256 A records. A remote attacker can send or induce such a DNS response to cause a denial of service.
Repeated triggering of this condition can abort the process.
How to mitigate CVE-2026-58042
Install security update from vendor's website.