CVE-2026-68584: Siyuan-Note Siyuan

High severity, CVSS 8.6. EPSS: 0.5% chance of exploitation in the next 30 days.

SiYuan versions before v3.7.3 contain an authentication bypass vulnerability in publish mode where content-returning endpoints getHeadingChildrenDOM, getHeading*Transaction, and getBacklinkDoc perform no password check despite protecting the primary getDoc endpoint. Anonymous attackers can retrieve full content of password-protected documents by obtaining internal block IDs from reader-accessible endpoints and calling unprotected content endpoints to bypass the password gate.

Affected products

• Siyuan-Note Siyuan: before 3.7.3 (fixed in 3.7.3)

Published 2026-08-03. Last modified 2026-08-26.