SB2026050527 - Cross-site scripting in Open WebUI
Published: May 5, 2026
Security Bulletin ID
SB2026050527
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Cross-site scripting (CVE-ID: N/A)
The vulnerability allows a remote user to execute arbitrary JavaScript in the browser of another user.
The vulnerability exists due to cross-site scripting in model description rendering in the chat UI when processing a crafted model description containing a javascript: link. A remote user can create a malicious model description to execute arbitrary JavaScript in the browser of another user.
User interaction is required, and the victim must view the malicious model and click the rendered hyperlink.
Remediation
Install update from vendor's website.