CVE-2026-103043
anchorme through 3.0.8 Regular Expression Denial of Service
- State
- Published
- Severity
- 8.7 High
- Published
- Sep 29, 2026
- Updated
- Oct 20, 2026
- Reserved
- Sep 29, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 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 | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-1333 Inefficient Regular Expression Complexity
Affected Products
| Product | Versions |
|---|---|
anchormealexcorvi |
|
References
- https://gist.github.com/mmadersbacher/46050b4224eb979431986cdef1dd2ad3third-party-advisory
- https://github.com/alexcorvi/anchorme.js/blob/f3ae9850baa344f27b46bb149e9b891831d273b1/src/index.ts#L109technical-description
- https://www.npmjs.com/package/anchormeproduct
- https://github.com/alexcorvi/anchorme.jsproduct
- VulnCheck Advisory: anchorme through 3.0.8 Regular Expression Denial of Servicethird-party-advisory
- https://gist.github.com/R3tro16/92948206e9893a3739b91746439384abtechnical-descriptionexploit
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