Vulnerability Description
SiYuan versions before 3.7.4 contain a cross-site WebSocket hijacking vulnerability in the admin-only /ws/network/proxy endpoint that explicitly disables origin validation by setting CheckOrigin to unconditionally return true. Attackers can craft malicious webpages that establish WebSocket connections to this endpoint and direct the SiYuan kernel process to proxy arbitrary network traffic to attacker-chosen targets, enabling authenticated network pivoting through the victim's machine.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-3cc2-h3v6-rqpq
- https://www.vulncheck.com/advisories/siyuan-cross-site-websocket-hijacking-via-n
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-3cc2-h3v6-rqpq
FAQ
What is CVE-2026-74802?
CVE-2026-74802 is a vulnerability with a CVSS score of 8.2 (HIGH). SiYuan versions before 3.7.4 contain a cross-site WebSocket hijacking vulnerability in the admin-only /ws/network/proxy endpoint that explicitly disables origin validation by setting CheckOrigin to un...
How severe is CVE-2026-74802?
CVE-2026-74802 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-74802?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.