CVE-2026-33194 SiYuan has an Incomplete Fix for IsSensitivePath Denylist Allows File Read from /opt, /usr, /home
An attacker can read sensitive files from system directories like /opt, /usr, and /home due to an incomplete path denylist in SiYuan.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33194?
CVE-2026-33194 is a medium-severity path traversal vulnerability in B3log Siyuan, published on 20 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
SiYuan is a personal knowledge management system. Prior to version 3.6.2, the `IsSensitivePath()` function in `kernel/util/path.go` uses a denylist approach that was recently expanded (GHSA-h5vh-m7fg-w5h6, commit 9914fd1) but remains incomplete. Multiple security-relevant Linux directories are not blocked, including `/opt` (application data), `/usr` (local configs/binaries), `/home` (other users), `/mnt` and `/media` (mounted volumes). The `globalCopyFiles` and `importStdMd` endpoints rely on `IsSensitivePath` as their primary defense against reading files outside the workspace. Version 3.6.2 contains an updated fix.
Weakness: CWE-22
Which versions are affected by CVE-2026-33194?
3 open source packages ship an affected version, including github.com/siyuan-note/siyuan/kernel. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/siyuan-note/siyuan/kernel Go | All versions | None |
github.com/siyuan-note/siyuan/kernel Go | All versions | 3.6.2 |
github.com/siyuan-note/siyuan/kernel Go | All versions | 3.6.2 |
Products include B3log Siyuan.
How do I fix CVE-2026-33194?
Upgrade github.com/siyuan-note/siyuan/kernel to 3.6.2 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-33194 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33194 exists.
Other vulnerabilities in B3log Siyuan
- CVE-2026-32938 SiYuan has an Arbitrary File Read in its Desktop Publish Service
- CVE-2026-33669 SiYuan has Arbitrary Document Reading within the Publishing Service
- CVE-2026-33670 SiYuan has directory traversal within its publishing service
- CVE-2026-32767 SiYuan: Authorization Bypass Allows Arbitrary SQL Execution via Search API
- CVE-2024-53504 SQL injection in n/a
Sources
Also known as GHSA-vm69-h85x-8p85, GO-2026-4766.