CVE-2026-92986: Siyuan-Note Siyuan

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

SiYuan before 3.8.4 renders document titles as HTML in the backlink dock tree without escaping markup characters. Attackers can set malicious titles through the rename API or crafted notebooks to execute scripts in the Electron renderer with access to child_process for command execution.

Affected products

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

Published 2026-09-17. Last modified 2026-09-17.