CVE-2026-100644: Siyuan-Note Siyuan

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

SiYuan before v3.8.4 contains a SQL injection vulnerability in the graph query endpoint where the dailyNoteSavePath parameter is concatenated into SQL without escaping. Unauthenticated attackers on published sites with auth disabled can inject SQL via UNION SELECT to extract arbitrary database rows from all notebooks.

Affected products

• Siyuan-Note Siyuan: before 3.8.4 (fixed in 3.8.4)

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