{"action":"Upgrade league/commonmark to 2.9.1 or later.","affected":[{"fixed":"2.9.1","introduced":"1.5.0"}],"component":"league/commonmark","cve_ids":["CVE-2026-86429"],"ecosystem":"Packagist","epss":0.00515,"exploited":false,"fixed_versions":["2.9.1"],"ghsa_id":"GHSA-jjv6-8j6v-6j52","id":"tcs_01M5KF4NWGJF6Q8QG0A4DQ7TCJ","modified_at":"2026-09-08T12:38:13.841138326Z","published_at":"2026-09-01T20:21:45Z","references":["https://osv.dev/vulnerability/GHSA-jjv6-8j6v-6j52","https://github.com/thephpleague/commonmark/security/advisories/GHSA-jjv6-8j6v-6j52","https://github.com/thephpleague/commonmark/commit/04a5d11ef6bf2d0b927310810d6a2a85d3c184b9","https://github.com/thephpleague/commonmark/commit/2f611b599c51661b005dc45c16ceaa547546e687","https://github.com/thephpleague/commonmark","https://github.com/thephpleague/commonmark/releases/tag/2.9.1"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-jjv6-8j6v-6j52","url":"https://osv.dev/vulnerability/GHSA-jjv6-8j6v-6j52"}],"summary":"league/commonmark: Denial of service in the SmartPunct and Attributes extensions"}