What’s Vulnerable › Vulnerabilities

CVE-2026-41894: SiYuan: Incomplete Fix Bypass for CVE-2026-30869: Path Traversal via Double URL Encoding in `/export/` Endpoint

• Severity: high (CVSS 7.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-24 · updated 2026-06-17
• Weakness: CWE-22

Description

SiYuan is an open-source personal knowledge management system. Prior to 3.6.5, the fix for CVE-2026-30869 only added a denylist check (IsSensitivePath) but did not address the root cause — a redundant url.PathUnescape() call in serveExport(). An authenticated attacker can use double URL encoding (%252e%252e) to traverse directories and read arbitrary workspace files including the full SQLite database (siyuan.db), kernel log, and all user documents. This vulnerability is fixed in 3.6.5.

Affected products

• siyuan-note siyuan: before 3.6.5

References

• https://github.com/siyuan-note/siyuan/commit/bb481e1290c4a34255652ede85a546504505d2a7
• https://github.com/siyuan-note/siyuan/releases/tag/v3.6.5
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hjh7-r5w8-5872
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hjh7-r5w8-5872

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