CVE-2026-72810: Siyuan-Note Siyuan

High severity, CVSS 8.6. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Siyuan-Note Siyuan: before 3.7.4 (fixed in 3.7.4)

Published 2026-08-14. Last modified 2026-08-26.