Missing Authorization Vulnerability in SiYuan Note
CVE-2026-103762

6.9MEDIUM

Key Information:

Vendor

Siyuan-note

Status
Siyuan
Vendor
CVE Published:
2 October 2026

What is CVE-2026-103762?

The vulnerability identified in SiYuan before version 3.8.5 allows unauthorized access to sensitive information via the getRefCreateSavePath, getShorthandSavePath, and getDocCreateSavePath endpoints. Attackers with read-only access can post requests using any open notebook ID to discover hidden notebook details, including the global save-box ID and save-path template. This flaw exposes unpublished notebooks' existence and creation timestamps, putting user data at risk.

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-pi
.