CVE Catalog

CVE-2026-70486

HighCVSS 8.2
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.37%

30th percentile - higher than 30% of all known CVEs

Summary

Open WebUI from 0.9.0 until 0.11.0 has a vulnerability in the terminal file-preview serveUrl iframe branch, which always grants allow-same-origin and allow-scripts for HTML files. Any authenticated user with access to a configured terminal server could cause script execution in the Open WebUI origin, steal the victim's session token, and take over the account, with possible server-side code execution if the victim was an admin.

Risk Assessment

An attacker can take over a user's account, including an admin, potentially leading to full platform and data compromise.

Recommendation

Update Open WebUI to version 0.11.0 or later. Restrict access to the terminal server and monitor activity.

Other vulnerabilities in Open WebUI

See all
Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS