CVE-2026-41894 SiYuan: Incomplete Fix Bypass for CVE-2026-30869: Path Traversal via Double URL Encoding in `/export/` Endpoint
An authenticated attacker can bypass path traversal protections via double URL encoding to read arbitrary workspace files, including the database and user documents.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41894?
CVE-2026-41894 is a high-severity path traversal vulnerability in siyuan-note siyuan, published on 24 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-41894?
3 open source packages ship an affected version, including github.com/siyuan-note/siyuan/kernel.
| Package | Affected | Fixed in |
|---|---|---|
github.com/siyuan-note/siyuan/kernel Go | All versions | None |
github.com/siyuan-note/siyuan/kernel Go | All versions | 3.6.5 |
github.com/siyuan-note/siyuan/kernel Go | All versions | 3.6.5 |
How do I fix CVE-2026-41894?
Upgrade github.com/siyuan-note/siyuan/kernel to 3.6.5 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-41894 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41894 exists.
Sources
Also known as GHSA-hjh7-r5w8-5872, GO-2026-5429.