Information Disclosure Vulnerability in SiYuan by SiYuan Note
CVE-2026-68587

9.2CRITICAL

Key Information:

Vendor

Siyuan-note

Status
Siyuan
Vendor
CVE Published:
3 August 2026

What is CVE-2026-68587?

SiYuan versions prior to v3.7.3 exhibit an information disclosure vulnerability within the getHeadingDeleteTransaction, getHeadingLevelTransaction, and getHeadingInsertTransaction endpoints. This flaw allows unauthorized users, including anonymous readers and RoleReader tokens, to access rendered block DOMs without proper publish-access checks. Consequently, attackers can exploit this vulnerability to retrieve the full rendered content of documents that are intended to remain restricted.

Affected Version(s)

siyuan 0 < 3.7.3

siyuan 3.7.3

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:
9.2
Severity:
CRITICAL
Confidentiality:
High
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
.