{"id":"CVE-2026-115350","title":"Mistune before 3.3.0 Stored XSS via Include Directive HTML Files","summary":"Mistune before 3.3.0 contains a cross-site scripting vulnerability in the Include directive that emits included .html, .xhtml, or .htm file content as raw block_html tokens. Attackers who can plant an HTML file readable by the renderer c…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cvssSource":"cna","cwe":["CWE-79"],"vendor":"lepture","product":"mistune","affected":["mistune < 3.3.0"],"published":"2026-10-22","updated":"2026-10-22","sourceUpdated":"2026-10-22T19:13:26.891Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115350","references":[{"url":"https://github.com/lepture/mistune/security/advisories/GHSA-96vr-jm8v-g22j","label":"GitHub Security Advisory (GHSA-96vr-jm8v-g22j)"},{"url":"https://www.vulncheck.com/advisories/mistune-before-3.3.0-stored-xss-via-include-directive-html-files","label":"VulnCheck Advisory: Mistune before 3.3.0 Stored XSS via Include Directive HTML Files"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T22:00:50.395Z","slug":"CVE-2026-115350","body":"## Overview\n\nMistune before 3.3.0 contains a cross-site scripting vulnerability in the Include directive that emits included .html, .xhtml, or .htm file content as raw block_html tokens. Attackers who can plant an HTML file readable by the renderer can reference it via an include directive, combined with path traversal, to execute stored scripts when escape=False is set.\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":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}