{"schema":"threatline.record/2","record":{"id":"CVE-2026-116171","aliases":["GHSA-6gmc-424x-xgpm"],"summary":"SiYuan 3.5.4 before 3.8.7 Sensitive Path Bypass via Windows Extended-Length Prefix","details":"SiYuan 3.5.4 before 3.8.7 on Windows contains a sensitive-path denylist bypass in IsSensitivePath because the Windows extended-length prefix (\\\\?\\) survives filepath.Clean and matches no forbidden prefix. Authenticated API callers can prepend the prefix to localPath in /api/import/importStdMd to copy workspace conf files, including the API token and TLS private keys, into assets served to unauthenticated clients.","categories":["Unclassified"],"product":"siyuan","vendor":"siyuan-note","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116171","source_modified_at":"2026-10-25T14:27:43.223Z","fetched_at":"2026-10-25T16:01:37.004770Z","product":"siyuan","vendor":"siyuan-note","versions":[{"version":"3.5.4","status":"affected","versionType":"semver","lessThan":"3.8.7"},{"version":"3.8.7","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116171","source_modified_at":"2026-10-25T14:27:43.223Z","fetched_at":"2026-10-25T16:01:37.004770Z","package":{"name":"siyuan","ecosystem":null},"version":"3.8.7","basis":"first unaffected version stated in the CVE record"}],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-25T13:20:13.056Z","modified_at":"2026-10-25T14:27:43.223Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-116171","fetched_at":"2026-10-25T16:01:37.004770Z","source_modified_at":"2026-10-25T14:27:43.223Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6gmc-424x-xgpm","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/siyuan-3.5.4-before-3.8.7-sensitive-path-bypass-via-windows-extended-length-prefix","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-25T14:27:43.223Z","content_hash":"e84a019764bad026962d893590bf508308a1f0552b9beb55ce00958aed141156"}}