Information Disclosure in SiYuan Prior to 3.8.5
CVE-2026-105205

6.9MEDIUM

Key Information:

Vendor

Siyuan-note

Status
Siyuan
Vendor
CVE Published:
4 October 2026

What is CVE-2026-105205?

An information disclosure vulnerability in SiYuan prior to version 3.8.5 allows unauthorized users to access sensitive details related to password-protected and publish-disabled documents. By querying a published document, an attacker can utilize specific API endpoints (/api/block/getDocInfo and getDocsInfo) to extract refIDs and refCounts for hidden referencing blocks. This flaw exposes critical information, enabling publish-mode readers to bypass the intended confidentiality settings of documents.

Affected Version(s)

siyuan 0 < 3.8.5

siyuan 3.8.5

References

https://github.com/siyuan-note/siyuan/security/advisories...
vendor-advisory
https://www.vulncheck.com/advisories/siyuan-before-3.8.5-...
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

manus-use
.