{"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_01M5KFH7VCKNDTG49XPWD4GQCH","modified_at":"2026-07-20T21:46:40.083797845Z","published_at":"2026-07-20T21:34:14Z","references":["https://osv.dev/vulnerability/GHSA-g97x-gvcm-x72h","https://github.com/lepture/mistune/security/advisories/GHSA-g97x-gvcm-x72h","https://nvd.nist.gov/vuln/detail/CVE-2026-59926","https://github.com/lepture/mistune/commit/a3cb6e5655308797e8be021d6c7b5bab13cbace2","https://github.com/lepture/mistune","https://github.com/lepture/mistune/releases/tag/v3.2.1","https://github.com/pypa/advisory-database/tree/main/vulns/mistune/PYSEC-2026-2214.yaml"],"severity":{"label":"medium"},"sources":[{"source":"osv","source_id":"GHSA-g97x-gvcm-x72h","url":"https://osv.dev/vulnerability/GHSA-g97x-gvcm-x72h"}],"summary":"Mistune: XSS via unescaped class option in Admonition directive"}