Remote Code Execution in SiYuan Product Affects Users
CVE-2026-73043

9.4CRITICAL

Key Information:

Vendor

Siyuan-note

Status
Siyuan
Vendor
CVE Published:
15 August 2026

What is CVE-2026-73043?

SiYuan versions before v3.7.4 have a vulnerability in their Template calculation operator, allowing attackers to execute arbitrary code via user-authored Go templates. The issue arises from the lack of sanitization of output, enabling the injection of malicious HTML and JavaScript into template calculations. If the database is opened, the executed code can run in the desktop client renderer with Node integration enabled, potentially compromising the user's system.

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-remote...
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Shirshakhtml
.