CVE-2026-70486
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, the terminal file-preview serveUrl iframe branch always granted allow-same-origin together with allow-scripts for HTML files served from the application origin. Any authenticated user with access to a configured terminal server could cause script in a previewed file to run in the Open WebUI origin, read the victim's session token from localStorage, and take over the account, with possible server-side code execution if the victim was an admin or held workspace.functions. This issue is fixed in 0.11.0.
How to fix
- openwebui open_webui0.11.0 or later
- open-webui0.11.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openwebui open_webui | 0.9.0 ≤ v < 0.11.0 | 0.11.0 |
| open-webuiPyPI | 0.9.0 ≤ v < 0.11.0 | 0.11.0 |
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Attack Surface Management
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