GHSA-hjh7-r5w8-5872
Medium · 6.5SiYuan: Path Traversal via Double URL Encoding in `/export/` Endpoint (Incomplete Fix Bypass for CVE-2026-30869)
CVSS
6.5
EPSS
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Published
Apr 22, 2026
CISA due date
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The record
The fix for CVE-2026-30869 in SiYuan v3.5.10 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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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