{"action":"Upgrade mistune to 3.3.0 or later.","affected":[{"fixed":"3.3.0","introduced":"0"}],"component":"mistune","cve_ids":["CVE-2026-59929"],"ecosystem":"PyPI","epss":0.00341,"exploited":false,"fixed_versions":["3.3.0"],"ghsa_id":"GHSA-qfrw-5rxm-mhh2","id":"tcs_01M5KFVZMJFXADF67XE560AXR9","modified_at":"2026-07-20T21:46:41.246867209Z","published_at":"2026-07-20T21:35:30Z","references":["https://osv.dev/vulnerability/GHSA-qfrw-5rxm-mhh2","https://github.com/lepture/mistune/security/advisories/GHSA-qfrw-5rxm-mhh2","https://nvd.nist.gov/vuln/detail/CVE-2026-59929","https://github.com/lepture/mistune/commit/c7101fcbb6e8790e8e39157c5ca2238fc6dd6cbc","https://github.com/lepture/mistune","https://github.com/lepture/mistune/releases/tag/v3.3.0","https://github.com/pypa/advisory-database/tree/main/vulns/mistune/PYSEC-2026-2217.yaml"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"GHSA-qfrw-5rxm-mhh2","url":"https://osv.dev/vulnerability/GHSA-qfrw-5rxm-mhh2"}],"summary":"Mistune renderers/html.safe_url: HARMFUL_PROTOCOLS list misses legacy and chained schemes that historically chain to `javascript:` execution"}