ALPINE-CVE-2026-66046

ALPINE-CVE-2026-66046

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Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an O(N^2) linear scan of elementType->defaultAtts to determine CDATA status. A remote unauthenticated attacker can supply a single well-formed XML document of a few megabytes to an application parsing untrusted XML to cause excessive CPU consumption, resulting in denial of service without requiring authentication, external entity resolution, or non-default parser options.

CVSS 8.7 · Élevée · Correctif disponible

Publication

2026-08-18T15:16:57Z

Mise à jour

2026-10-01T02:17:49.389480731Z

Pile logicielle: system

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