CVE-2026-103043

HighCVSS 7.5/10Last modified Oct 20, 2026

Description

anchorme through 3.0.8 contains a regular expression denial of service vulnerability in the IPv6 host extraction regex due to catastrophic backtracking. Attackers can supply specially crafted input strings with repeated patterns to cause exponential regex engine backtracking, blocking the Node.js event loop and denying service to other requests.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Sep 29, 2026
Last modified
Oct 20, 2026
NVD status
Deferred

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CVE-2026-103043: High severity, CVSS 7.5 | Vulnix