CVE-2026-103043highCWE-1333

CVE-2026-103043: high-severity vulnerability in alexcorvi anchorme

anchorme through 3.0.8 Regular Expression Denial of Service

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.7epss 0.4%
exploitation probability
0.4%top 63% of all CVEs
observed exploitation
nono source reports it
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
alexcorvi · anchorme
References
https://gist.github.com/mmadersbacher/46050b4224eb979431986cdef1dd2ad3https://github.com/alexcorvi/anchorme.jshttps://github.com/alexcorvi/anchorme.js/blob/f3ae9850baa344f27b46bb149e9b891831d273b1/src/index.ts#L109https://www.npmjs.com/package/anchormehttps://www.vulncheck.com/advisories/anchorme-through-3.0.8-regular-expression-denial-of-service