CVE-2026-44721 Details
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, a stored cross-site scripting (XSS) vulnerability that allows any authenticated user with model creation permission (workspace.models) to execute arbitrary JavaScript in the browser of any other user (including admins) who views the malicious model in the chat UI. This vulnerability is fixed in 0.9.0.
A stored cross-site scripting vulnerability has been identified in Open WebUI, a self-hosted AI platform, in versions through 0.8.12. This vulnerability allows any authenticated user with model creation permissions to execute arbitrary JavaScript in the browsers of other users, including admins, who view the affected model in the chat interface. The issue arises because model descriptions are stored without proper sanitization and are later processed in a way that allows JavaScript payloads to be executed.
Users are advised to update to Open WebUI version 0.9.0 or later, where this vulnerability has been fixed. In version 0.9.0, the issue was addressed by wrapping the output of 'marked.parse()' in 'DOMPurify.sanitize()', which removes 'javascript:' URIs and other harmful HTML before it is rendered.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 19, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/open-webui/open-webui/security/advisories/GHSA-gf5m-wcrh-7928 | CISA-ADP | ExploitMitigationVendor Advisory |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-gf5m-wcrh-7928 | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| openwebui open webui | < 0.9.0 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 19, 2026 | CVE Modified | CISA-ADP |
| May 19, 2026 | Initial Analysis | [email protected] |
| May 15, 2026 | New CVE Received | [email protected] |