CVE-2026-68587: Siyuan-Note Siyuan

High severity, CVSS 8.6. EPSS: 0.4% chance of exploitation in the next 30 days.

SiYuan versions before v3.7.3 contain an information disclosure vulnerability in the getHeadingDeleteTransaction, getHeadingLevelTransaction, and getHeadingInsertTransaction endpoints that return rendered block DOM without publish-access checks. Anonymous readers or publish RoleReader tokens can supply a heading block ID to read full rendered content of publish-disabled documents that should be restricted.

Affected products

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

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