CVE-2026-73607: Siyuan-Note Siyuan

Medium severity, CVSS 5.8. EPSS: 0.3% chance of exploitation in the next 30 days.

SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the /api/storage/getOutlineStorage endpoint that performs no authorization checks. Attackers can retrieve outline state including heading identifiers for any document by supplying its identifier, even for documents forbidden to the requester.

Affected products

• Siyuan-Note Siyuan: before 3.7.4 (fixed in 3.7.4)

Published 2026-08-13. Last modified 2026-08-26.