CVEvulnerability

CVE-2026-70486

5.4 MEDIUM Published 2026-08-04 Modified 2026-09-18 Official page ↗
Status
Analyzed
Published
2026-08-04
Last modified
2026-09-18
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.2 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
CVSS 3.1 ([email protected])
5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weaknesses
CWE-1021, CWE-79

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.

Affected configurations

• openwebui open webui (>= 0.9.0 < 0.11.0)

Related

Weakness · CWE (2)

  • CWE-1021 Improper Restriction of Rendered UI Layers or Frames weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References