[CVE-2026-86433] commonmark versions from 1.5.0 before 2.8.4 contain a denial of service vulnerability in the Attribu…

Descripción técnica

commonmark versions from 1.5.0 before 2.8.4 contain a denial of service vulnerability in the Attributes extension where AttributesListener::findTargetAndDirection() performs quadratic-time sibling list scanning. Unauthenticated attackers can submit approximately 32 KB of repeated attribute blocks to cause parsing to take over 5 seconds, exhausting server resources.

Puntuación CVSS

Score: 7.5/10 — Severidad: HIGH — Estado NIST: Received

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Debilidades (CWE)

CWE-407

Fuente oficial

Publicado en NIST NVD.