CVE-2026-86430

弱点类型

league/commonmark versions before 2.9.1 contain multiple denial of service vulnerabilities in fenced code block detection, reference link label lookup, and emphasis delimiter processing that perform super-linear work on crafted input. Attackers can submit specially crafted Markdown with long backtick runs, nested brackets, or delimiter sequences to consume disproportionate CPU time and prevent legitimate requests from completing.

受影响产品

• thephpleague commonmark

参考链接

• https://github.com/thephpleague/commonmark/security/advisories/GHSA-j8pm-gj4c-rq4x
• https://www.vulncheck.com/advisories/league-commonmark-before-2.9.1-denial-of-service-via-parsing