CVE-2026-45665
CVE-2026-45665 · Open WebUI: Stored XSS in Banner Component via Improper Sanitization Order
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.0, a Stored Cross-Site Scripting (XSS) vulnerability exists in the Banner component due to an improper sanitization order (specifically, DOMPurify is executed before the marked library). This vulnerability allows a compromised or malicious administrator to plant a malicious payload in the global banner. Crucially, this vector enables Privilege Escalation, as the malicious banner is rendered for all users, including the Super Admin (Primary Admin). Consequently, the payload successfully bypasses the existing security mechanism. An attacker can leverage this to steal the Super Admin's session token This vulnerability is fixed in 0.8.0.
CVSS 8.1 · High · EPSS 0.3% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
open-webui
- Versions
- < 0.8.0: Affected
No fix published
open-webui npm
- Affected ranges
- SEMVER: < 0.8.0
Update to 0.8.0