{"id":"CVE-2026-115355","aliases":["GHSA-h7ww-273w-6cm8"],"url":"https://o3.security/vulnerability/CVE-2026-115355","summary":"Mistune before 3.3.0 Path Traversal and XSS via Include Directive","details":"Mistune before 3.3.0 contains a path traversal vulnerability in the Include directive that allows attackers to read arbitrary files by supplying ../ sequences in include paths. Attackers can also inject HTML through unescaped error messages and included file contents to perform cross-site scripting even when escape=True is set.","published":"2026-10-22T19:13:31.904Z","modified":"2026-10-23T10:45:32.883733202Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115355.json"},{"type":"ADVISORY","url":"https://github.com/lepture/mistune/security/advisories/GHSA-h7ww-273w-6cm8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115355"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/mistune-before-3.3.0-path-traversal-and-xss-via-include-directive"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-23T10:45:32.883733202Z"}}