CVEvulnerability
CVE-2026-103043
8.7 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2026-09-29
- Last modified
- 2026-10-20
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 8.7 HIGH — 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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-1333
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.
Related
Weakness · CWE (1)
- CWE-1333 Inefficient Regular Expression Complexity weakness
References
- https://gist.github.com/R3tro16/92948206e9893a3739b91746439384ab gist.github.com
- https://gist.github.com/mmadersbacher/46050b4224eb979431986cdef1dd2ad3 gist.github.com
- https://github.com/alexcorvi/anchorme.js github.com
- https://github.com/alexcorvi/anchorme.js/blob/f3ae9850baa344f27b46bb149e9b891831d273b1/src/index.ts#L109 github.com
- https://www.npmjs.com/package/anchorme www.npmjs.com
- https://www.vulncheck.com/advisories/anchorme-through-3.0.8-regular-expression-denial-of-service www.vulncheck.com
- https://gist.github.com/mmadersbacher/46050b4224eb979431986cdef1dd2ad3 gist.github.com