{"action":"Upgrade mistune to 3.3.0 or later.","affected":[{"fixed":"3.3.0","introduced":"0"}],"component":"mistune","cve_ids":["CVE-2026-59922"],"ecosystem":"PyPI","epss":0.00644,"exploited":false,"fixed_versions":["3.3.0"],"ghsa_id":"GHSA-c8j7-8cv4-2xmq","id":"tcs_01M5KGY3MGG44C5P1F4S732F2H","modified_at":"2026-07-13T07:15:29.086264845Z","published_at":"2026-07-08T17:17:27.770Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2210","https://github.com/lepture/mistune/releases/tag/v3.3.0","https://github.com/lepture/mistune/commit/96d0f57f8fe9eeb06bb4cff521962a27d7c402e7","https://github.com/lepture/mistune/security/advisories/GHSA-c8j7-8cv4-2xmq"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-2210","url":"https://osv.dev/vulnerability/PYSEC-2026-2210"}],"summary":"Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a run of closed tilde, equals-sign, or caret marker pairs around a character causes quadratic work in src/mistune/plugin"}