Stored Cross-Site Scripting in SiYuan by SiYuan Note
CVE-2026-73050

9.4CRITICAL

Key Information:

Vendor

Siyuan-note

Status
Siyuan
Vendor
CVE Published:
15 August 2026

What is CVE-2026-73050?

Versions of SiYuan prior to v3.7.4 are vulnerable to stored cross-site scripting due to inadequate validation and escaping of the color field in attribute-view select options. Attackers can exploit this flaw by injecting malicious event-handler attributes through the color value, enabling arbitrary JavaScript execution within affected databases. This vulnerability is present at multiple unescaped render sites, posing a significant risk to users and their 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-stored...
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
.