{"id":"CVE-2026-100637","published":"2026-09-26T14:16:45.320","lastModified":"2026-09-26T14:16:45.433","description":"SiYuan versions before v3.8.4 contain a path traversal vulnerability in the checkoutRepo endpoint that allows authenticated administrators to write JSON files outside the workspace. Attackers can supply a sessionID parameter containing directory traversal sequences to overwrite arbitrary JSON files in pre-existing kernel-writable directories outside workspace boundaries.","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-73"],"vendors":[],"products":[],"references":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jhmh-hr4g-c5g2","tags":[]},{"url":"https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-checkoutrepo-sessionid","tags":[]}],"exploitRefs":[{"url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jhmh-hr4g-c5g2","tags":[]}],"hasPoc":true,"ai":null}