CVE-2026-85174: Siyuan-Note Siyuan

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

SiYuan before v3.8.2 logs API tokens from query parameters in plaintext to an accessible log file when full-text search requests exceed timing thresholds. Authenticated attackers can read the log file via the getFile endpoint to recover admin API tokens and gain permanent administrative access.

Affected products

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

Published 2026-09-03. Last modified 2026-09-08.