CVE-2026-73050: Siyuan-Note Siyuan

Critical severity, CVSS 9.0. EPSS: 0.4% chance of exploitation in the next 30 days.

SiYuan versions before v3.7.4 fail to validate or escape the color field in attribute-view select options, allowing stored cross-site scripting through eight unescaped render sites. Attackers can inject event-handler attributes by including quotation marks in the color value, executing arbitrary JavaScript when viewing databases containing the malicious select field.

Affected products

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

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