CVE-2026-23645
Medium
Description
SiYuan is self-hosted, open source personal knowledge management software. Prior to 3.5.4-dev2, a Stored Cross-Site Scripting (XSS) vulnerability exists in SiYuan Note. The application does not sanitize uploaded SVG files. If a user uploads and views a malicious SVG file (e.g., imported from an untrusted source), arbitrary JavaScript code is executed in the context of their authenticated session. This vulnerability is fixed in 3.5.4-dev2.
SeverityMedium
CVSS6.1
Exploit probability—
ProductB3log Siyuan
PublishedJan 16, 2026
First seenJan 16, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- b3log siyuan3.5.4 or later
- github.com/siyuan-note/siyuan/kernel0.0.0-20260116101155-11115da3d0de or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| b3log siyuan | v < 3.5.4, 3.5.4 | 3.5.4 |
| github.com/siyuan-note/siyuan/kernelGo | v < 0.0.0-20260116101155-11115da3d0de | 0.0.0-20260116101155-11115da3d0de |
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