CVE-2026-105830

php-league-commonmark: league/commonmark from 2.0.0 before 2.10.2 contains a quadratic-time denial of service vulnerability in the GitHub Fl...

CVE-2026-105830 is fixed in php-league-commonmark on 1 platform by DEBIAN-CVE-2026-105830 (version 2.10.3-1), released October 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

n/a

No vendor severity

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0037

30th percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
php-league-commonmark · Debian 14	2.10.3-1	DEBIAN-CVE-2026-105830	Oct 10, 2026

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