Security Advisory

CVE-2026-70486

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-04 20:01:55

Last updated 2026-08-05 14:29:05

Assigner GitHub_M

CVSS score not scored

State PUBLISHED

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.

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