Path Traversal in Siyuan-Note Siyuan
CVE-2026-116171
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/security/advisories/GHSA-6gmc-424x-xgpm (vendor-advisory)
- www.vulncheck.com/advisories/siyuan-3.5.4-before-3.8.7-sensitive-path-bypass-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116171?
- CVE-2026-116171 is a high-severity vulnerability in Siyuan-Note Siyuan, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-10-25.
- How severe is CVE-2026-116171?
- High severity. CVSS v3 base score is 7.5 out of 10.