CVE-2026-87813: Siyuan-Note Siyuan

High severity, CVSS 7.3. EPSS: 0.4% chance of exploitation in the next 30 days.

SiYuan before v3.8.2 contains a stored cross-site scripting vulnerability in the Search Assets result list where asset filenames are interpolated into HTML without escaping. Authenticated attackers can craft asset filenames containing malicious markup that executes JavaScript in the victim's browser when searching assets, enabling same-origin API requests and application state manipulation.

Affected products

• Siyuan-Note Siyuan: before 3.8.2 (fixed in 3.8.2)

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