Vulnerability Description
SiYuan is a personal knowledge management system. In versions 3.6.0 and below, the WebSocket endpoint (/ws) allows unauthenticated connections when specific URL parameters are provided (?app=siyuan&id=auth&type=auth). This bypass, intended for the login page to keep the kernel alive, allows any external client — including malicious websites via cross-origin WebSocket — to connect and receive all server push events in real-time. These events leak sensitive document metadata including document titles, notebook names, file paths, and all CRUD operations performed by authenticated users. Combined with the absence of Origin header validation, a malicious website can silently connect to a victim's local SiYuan instance and monitor their note-taking activity. This issue has been fixed in version 3.6.1.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| B3Log | Siyuan | < 3.6.1 |
Related Weaknesses (CWE)
References
- https://github.com/siyuan-note/siyuan/commit/1e370e37359778c0932673e825182ff555bPatch
- https://github.com/siyuan-note/siyuan/releases/tag/v3.6.1Release Notes
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-xp2m-98x8-rpj6ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-32815?
CVE-2026-32815 is a vulnerability with a CVSS score of 7.5 (HIGH). SiYuan is a personal knowledge management system. In versions 3.6.0 and below, the WebSocket endpoint (/ws) allows unauthenticated connections when specific URL parameters are provided (?app=siyuan&id...
How severe is CVE-2026-32815?
CVE-2026-32815 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32815?
Check the references section above for vendor advisories and patch information. Affected products include: B3Log Siyuan.