CVE-2026-74802 — SiYuan 3.7.3 Cross-Site WebSocket Hijacking via network proxy
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 se…
Published: 2026-08-17 · CVSS: 7.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7