CVE-2026-32749 SiYuan importSY/importZipMd: Path Traversal via multipart filename enables arbitrary file write
An admin can exploit path traversal in SiYuan import APIs to write arbitrary files, potentially achieving remote code execution or data destruction.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-32749?
CVE-2026-32749 is a high-severity path traversal vulnerability in B3log Siyuan, published on 19 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. In versions 3.6.0 and below, POST /api/import/importSY and POST /api/import/importZipMd write uploaded archives to a path derived from the multipart filename field without sanitization, allowing an admin to write files to arbitrary locations outside the temp directory - including system paths that enable RCE. This can lead to aata destruction by overwriting workspace or application files, and for Docker containers running as root (common default), this grants full container compromise. This issue has been fixed in version 3.6.1.
Which versions are affected by CVE-2026-32749?
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 to 0.0.0-20260313024916-fd6526133bb3 | None |
github.com/siyuan-note/siyuan/kernel Go | All versions to 0.0.0-20260313024916-fd6526133bb3 | None |
Products include B3log Siyuan.
How do I fix CVE-2026-32749?
Upgrade to a fixed version.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-32749 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32749 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-qvvf-q994-x79v, GO-2026-4707.