{"action":"Upgrade mistune to 3.3.0 or later.","affected":[{"fixed":"3.3.0","introduced":"0"}],"component":"mistune","cve_ids":["CVE-2026-59926"],"ecosystem":"PyPI","epss":0.00327,"exploited":false,"fixed_versions":["3.3.0"],"ghsa_id":"GHSA-g97x-gvcm-x72h","id":"tcs_01M5KGY4706E4Q6Q15TJWYGT7N","modified_at":"2026-07-13T07:15:18.821076445Z","published_at":"2026-07-08T17:17:28.323Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2214","https://github.com/lepture/mistune/releases/tag/v3.2.1","https://github.com/lepture/mistune/security/advisories/GHSA-g97x-gvcm-x72h","https://github.com/lepture/mistune/commit/a3cb6e5655308797e8be021d6c7b5bab13cbace2"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"PYSEC-2026-2214","url":"https://osv.dev/vulnerability/PYSEC-2026-2214"}],"summary":"Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, render_admonition() in src/mistune/directives/admonition.py concatenates the Admonition directive :class: option into th"}