{"id":"CVE-2026-115354","title":"Mistune before 3.3.0 Arbitrary Local File Read via Include Directive","summary":"Mistune before 3.3.0 contains a path traversal vulnerability in the opt-in Include directive that allows attackers to read local files by supplying relative or absolute include paths. Attackers who submit Markdown rendered via Markdown.r…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cvssSource":"cna","cwe":["CWE-22"],"vendor":"lepture","product":"mistune","affected":["mistune < 3.3.0"],"published":"2026-10-22","updated":"2026-10-22","sourceUpdated":"2026-10-22T19:13:31.132Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115354","references":[{"url":"https://github.com/lepture/mistune/security/advisories/GHSA-jhcm-5rpf-j3wv","label":"GitHub Security Advisory (GHSA-jhcm-5rpf-j3wv)"},{"url":"https://www.vulncheck.com/advisories/mistune-before-3.3.0-arbitrary-local-file-read-via-include-directive","label":"VulnCheck Advisory: Mistune before 3.3.0 Arbitrary Local File Read via Include Directive"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T22:00:50.396Z","slug":"CVE-2026-115354","body":"## Overview\n\nMistune before 3.3.0 contains a path traversal vulnerability in the opt-in Include directive that allows attackers to read local files by supplying relative or absolute include paths. Attackers who submit Markdown rendered via Markdown.read() can disclose files such as /etc/passwd and inject unescaped HTML or script content into rendered output.\n\n## Affected\n\n- `mistune < 3.3.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}