CVE-2026-103043anchorme through 3.0.8 Regular Expression Denial of Service
Updated under an hour ago ()
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It affects alexcorvi anchorme. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.45%, higher than 37% of scored CVEs.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-1333
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.45% (percentile 37)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
alexcorvi anchorme alexcorvi:anchorme (from the name) | through 3.0.8 | CNA record |
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
- https://www.vulncheck.com/advisories/anchorme-through-3.0.8-regular-expression-denial-of-servicethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.