{"id":"CVE-2026-100636","published":"2026-09-26T14:16:45.160","lastModified":"2026-09-28T17:17:43.380","description":"SiYuan versions before v3.8.4 contain a path traversal vulnerability in the exportBrowserHTML endpoint that allows authenticated administrators to write arbitrary HTML content to index.html outside the workspace directory. Attackers can supply a folder parameter with directory traversal sequences to escape the export directory and overwrite index.html in any pre-existing kernel-writable location, enabling stored XSS or workspace defacement.","cvssScore":7.6,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L","cwes":["CWE-22"],"vendors":[],"products":[],"references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jf98-m24w-gm9m","tags":[]},{"url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-exportbrowserhtml-folder","tags":[]},{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jf98-m24w-gm9m","tags":[]}],"exploitRefs":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jf98-m24w-gm9m","tags":[]},{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jf98-m24w-gm9m","tags":[]}],"hasPoc":true,"ai":null}