CVE-2026-72810 [HIGH] – SiYuan versions before v3.7.4 contain a publish-boundary bypass vulnerability in WebSocket

SiYuan versions before v3.7.4 contain a publish-boundary bypass vulnerability in WebSocket broadcast sessions that allows anonymous readers to receive unfiltered edits. Attackers can establish a WebSocket connection to the publish surface and passively receive real-time content events including password-protected and forbidden documents without authentication.