Information Disclosure Vulnerability in SiYuan Product by SiYuan Inc.
CVE-2026-72803

6.9MEDIUM

Key Information:

Vendor

Siyuan-note

Status
Siyuan
Vendor
CVE Published:
12 August 2026

What is CVE-2026-72803?

Versions of SiYuan prior to v3.7.4 lack essential publish-access checks in the getBlockAttrs and batchGetBlockAttrs endpoints. This oversight allows attackers to exploit the system by sending crafted POST requests containing block IDs, thereby gaining unauthorized access to sensitive block attributes, including names, aliases, memos, and custom fields from secured documents. This vulnerability highlights the importance of robust access control mechanisms to protect sensitive user data.

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
.