{"id":"CVE-2026-44708","aliases":["GHSA-8g87-j6q8-g93x","PYSEC-2026-2206"],"url":"https://o3.security/vulnerability/CVE-2026-44708","summary":"Mistune Math Plugin XSS Escape Bypass","details":"Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, the mistune math plugin renders inline math ($...$) and block math ($$...$$) by concatenating the raw user-supplied content directly into the HTML output without any HTML escaping. This occurs even when the parser is explicitly created with escape=True, which is supposed to guarantee that all user-controlled text is sanitised before reaching the DOM. This vulnerability is fixed in 3.2.1.","published":"2026-05-26T20:39:18.990Z","modified":"2026-08-07T11:51:10.669596664Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"mistune","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/lepture/mistune/releases/tag/v3.2.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44708.json"},{"type":"ADVISORY","url":"https://github.com/lepture/mistune/security/advisories/GHSA-8g87-j6q8-g93x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44708"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:10.669596664Z"}}