CVE-2026-105830
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Oct 08, 2026
Vendor
unknown
Description
league/commonmark from 2.0.0 before 2.10.2 contains a quadratic-time denial of service vulnerability in the GitHub Flavored Markdown Table extension's TableStartParser::tryStart() block-start scan. Unauthenticated attackers can submit a large paragraph of pipe-free lines not starting with letters, forcing repeated full-buffer strpos scans that exhaust PHP worker CPU.