Is CVE-2026-116171 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116171?

CVE-2026-116171 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-116171

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.