CVE-2026-29183
Description
SiYuan is a personal knowledge management system. Prior to version 3.5.9, an unauthenticated reflected XSS vulnerability exists in the dynamic icon API endpoint "GET /api/icon/getDynamicIcon" when type=8, attacker-controlled content is embedded into SVG output without escaping. Because the endpoint is unauthenticated and returns image/svg+xml, a crafted URL can inject executable SVG/HTML event handlers (for example onerror) and run JavaScript in the SiYuan web origin. This can be chained to perform authenticated API actions and exfiltrate sensitive data when a logged-in user opens the malicious link. This issue has been patched in version 3.5.9.
How to fix
- b3log siyuan3.5.9 or later
- github.com/siyuan-note/siyuan/kernel0.0.0-20260304034809-d68bd5a79391 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| b3log siyuan | v < 3.5.9 | 3.5.9 |
| github.com/siyuan-note/siyuan/kernelGo | v < 0.0.0-20260304034809-d68bd5a79391 | 0.0.0-20260304034809-d68bd5a79391 |
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