{"action":"Upgrade mistune to 3.3.0 or later.","affected":[{"fixed":"3.3.0","introduced":"0"}],"component":"mistune","cve_ids":["CVE-2026-59930"],"ecosystem":"PyPI","epss":0.00192,"exploited":false,"fixed_versions":["3.3.0"],"ghsa_id":"GHSA-2hm2-hc3v-44h9","id":"tcs_01M5KGY5NRD74YGE9FKKN9DSMB","modified_at":"2026-07-13T07:15:18.864143856Z","published_at":"2026-07-08T17:17:28.867Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2218","https://github.com/lepture/mistune/releases/tag/v3.3.0","https://github.com/lepture/mistune/commit/c4093c4742ed0d10d9332fb8edb455869b7b581b","https://github.com/lepture/mistune/security/advisories/GHSA-2hm2-hc3v-44h9"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"PYSEC-2026-2218","url":"https://osv.dev/vulnerability/PYSEC-2026-2218"}],"summary":"Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the toc plugin and TableOfContents directive generate heading IDs as predictable toc_N values without slugifying the hea"}