VULNERABILITY INTELLIGENCE
CVE-2026-74802
CVSS score8.2 HIGH
EPSS probability0.16%
CISA KEVNot currently listed
Published2026-08-17
Last modified2026-08-28
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
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.
Weakness classification
- disclosure@vulncheck.com: CWE-346