Vulnerability Description
SiYuan is a personal knowledge management system. Versions 3.6.0 and below render package metadata fields (displayName, description) using template literals without HTML escaping. A malicious package author can inject arbitrary HTML/JavaScript into these fields, which executes automatically when any user browses the Bazaar page. Because SiYuan's Electron configuration enables nodeIntegration: true with contextIsolation: false, this XSS escalates directly to full Remote Code Execution on the victim's operating system — with zero user interaction beyond opening the marketplace tab. This issue has been fixed in version 3.6.1.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| B3Log | Siyuan | < 3.6.1 |
Related Weaknesses (CWE)
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mvpm-v6q4-m2pfExploitMitigationVendor Advisory
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-mvpm-v6q4-m2pfExploitMitigationVendor Advisory
FAQ
What is CVE-2026-33067?
CVE-2026-33067 is a vulnerability with a CVSS score of 9.0 (CRITICAL). SiYuan is a personal knowledge management system. Versions 3.6.0 and below render package metadata fields (displayName, description) using template literals without HTML escaping. A malicious package ...
How severe is CVE-2026-33067?
CVE-2026-33067 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-33067?
Check the references section above for vendor advisories and patch information. Affected products include: B3Log Siyuan.