{"action":"Upgrade league/commonmark to 2.9.1 or later.","affected":[{"fixed":"2.9.1","introduced":"0.6.0"}],"component":"league/commonmark","cve_ids":["CVE-2026-86430"],"ecosystem":"Packagist","epss":0.00493,"exploited":false,"fixed_versions":["2.9.1"],"ghsa_id":"GHSA-j8pm-gj4c-rq4x","id":"tcs_01M5KF4DF4H6SHK6CSY1NBFR4G","modified_at":"2026-09-08T12:38:32.269578738Z","published_at":"2026-09-01T20:17:59Z","references":["https://osv.dev/vulnerability/GHSA-j8pm-gj4c-rq4x","https://github.com/thephpleague/commonmark/security/advisories/GHSA-j8pm-gj4c-rq4x","https://github.com/thephpleague/commonmark/commit/0768217751fbfaeb8d76762f6944e9af7114295e","https://github.com/thephpleague/commonmark/commit/d9375fadc308a63a02950a68d822417a6e4c33b2","https://github.com/thephpleague/commonmark/commit/e0036ef031fd36ec1c3c82db8743fc928b5271c8","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-j8pm-gj4c-rq4x","url":"https://osv.dev/vulnerability/GHSA-j8pm-gj4c-rq4x"}],"summary":"league/commonmark: Denial of service via crafted code fences, reference links, and emphasis delimiters"}