DOM XSS and OS Command Execution Vulnerability in SiYuan Personal Knowledge Management System
CVE-2026-55570

9CRITICAL

Key Information:

Vendor

Siyuan-note

Status
Siyuan
Vendor
CVE Published:
24 June 2026

What is CVE-2026-55570?

Prior to version 3.7.0, the SiYuan Personal Knowledge Management System suffers from a critical vulnerability that allows untrusted input fields, such as name, version, author, and description, to be improperly serialized into the data-obj HTML attribute. This flaw can lead to arbitrary HTML being injected when a malicious package name containing a single quote is processed. When executed in the desktop client (which runs with nodeIntegration enabled and contextIsolation disabled), this vulnerability escalates to remote code execution, posing a significant risk to users. The issue has been addressed in version 3.7.0, making it crucial for users to upgrade to this version to mitigate security risks.

Affected Version(s)

siyuan < 3.7.0

References

https://github.com/siyuan-note/siyuan/security/advisories...
x_refsource_CONFIRM

CVSS V3.1

Score:
9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.