CVE-2026-59833: Siyuan-Note Siyuan

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

SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, SiYuan renders note and package content to HTML through the Lute engine with sanitization enabled, but Lute's dangerous javascript scheme block does not check form action or SVG xlink:href attributes, allowing stored cross-site scripting in document export-preview and Bazaar package README render paths that can execute OS commands in the Electron desktop renderer. This issue is fixed in versions 3.7.1.

Affected products

• Siyuan-Note Siyuan: before 3.7.1 (fixed in 3.7.1)

Published 2026-07-09. Last modified 2026-07-10.