CVE-2026-73042: Siyuan-Note Siyuan

Critical severity, CVSS 9.0. EPSS: 0.5% chance of exploitation in the next 30 days.

SiYuan before v3.7.4 fails to properly escape database menu metadata in HTML interpolation, allowing stored values to execute script when users open group, view, or field-edit menus. Attackers can inject markup through field descriptions or names that close containing elements and execute arbitrary code via event handlers, reaching Node built-ins due to Electron's insecure configuration.

Affected products

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

Published 2026-08-15. Last modified 2026-08-26.