{"action":"Upgrade mistune to 3.3.0 or later.","affected":[{"fixed":"3.3.0","introduced":"0"}],"component":"mistune","cve_ids":["CVE-2026-59923"],"ecosystem":"PyPI","epss":0.00348,"exploited":false,"fixed_versions":["3.3.0"],"ghsa_id":"GHSA-8c25-4j27-2rv3","id":"tcs_01M5KGY3RWGNQ038ZCQWRW11RH","modified_at":"2026-07-13T07:15:29.095933312Z","published_at":"2026-07-08T17:17:27.910Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2211","https://github.com/lepture/mistune/releases/tag/v3.3.0","https://github.com/lepture/mistune/commit/c7101fcbb6e8790e8e39157c5ca2238fc6dd6cbc","https://github.com/lepture/mistune/security/advisories/GHSA-8c25-4j27-2rv3"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"PYSEC-2026-2211","url":"https://osv.dev/vulnerability/PYSEC-2026-2211"}],"summary":"Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, HTMLRenderer.safe_url() does not block percent-encoded javascript URIs, allowing attacker-supplied Markdown links or ima"}