Information Disclosure Vulnerability in SiYuan by SiYuan Technology
CVE-2026-73607

6.9MEDIUM

Key Information:

Vendor

Siyuan-note

Status
Siyuan
Vendor
CVE Published:
13 August 2026

What is CVE-2026-73607?

SiYuan versions prior to v3.7.4 have a vulnerability in the /api/storage/getOutlineStorage endpoint that lacks proper authorization checks. This flaw allows attackers to access outline state information, including heading identifiers, for any document by simply supplying its document identifier. Notably, this access is granted even for documents that the requester should not be able to view, posing a significant risk to user data privacy.

Affected Version(s)

siyuan 0 < 3.7.4

siyuan 3.7.4

References

https://github.com/siyuan-note/siyuan/security/advisories...
vendor-advisory
https://www.vulncheck.com/advisories/siyuan-before-inform...
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Shirshakhtml
.