{"id":"CVE-2026-116171","revision":"e6d4b49331ec4d3fb5afc9688babf0fb","records":[{"revision":"e6d4b49331ec4d3fb5afc9688babf0fb","observedAt":"2026-10-25T15:17:04.459+00:00","statement":{"source":"cve-program","id":"CVE-2026-116171","aliases":[],"title":"SiYuan 3.5.4 before 3.8.7 Sensitive Path Bypass via Windows Extended-Length Prefix","description":"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.","state":0,"publishedAt":"2026-10-25T13:20:13.056+00:00","modifiedAt":"2026-10-25T13:20:13.056+00:00","affected":[{"ecosystem":"Vendor product","name":"siyuan","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"siyuan-note\",\n                    \"product\": \"siyuan\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:golang/siyuan-note/siyuan\",\n                    \"versions\": [\n                        {\n                            \"version\": \"3.5.4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.8.7\"\n                        },\n                        {\n                            \"version\": \"3.8.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6gmc-424x-xgpm","https://www.vulncheck.com/advisories/siyuan-3.5.4-before-3.8.7-sensitive-path-bypass-via-windows-extended-length-prefix"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116171","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-116171","identifiers":["CVE-2026-116171"]},"retained":false,"historicalAffected":[]}],"coverage":[]}