CVE-2026-100645: Siyuan-Note Siyuan

High severity, CVSS 8.0. EPSS: 0.4% chance of exploitation in the next 30 days.

SiYuan versions 3.7.0 before 3.8.4 contain a stored cross-site scripting vulnerability in gallery and kanban database renderers where field descriptions are not escaped in aria-label attributes. In the Electron desktop app with nodeIntegration enabled, attackers can inject JavaScript that calls Node.js child_process APIs to execute arbitrary commands with user privileges.

Affected products

• Siyuan-Note Siyuan: from 3.7.0, before 3.8.4 (fixed in 3.8.4)

Published 2026-09-26. Last modified 2026-10-08.