CVE-2026-70486

Published: Ago 04, 2026 Last Modified: Ago 05, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,2
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: low
User Interaction: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: none

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0037
Percentile
0,3th
Updated

EPSS Score Trend (Last 3 Days)

79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Stable
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Confidentiality Integrity Availability
Potential Impacts:
Bypass Protection Mechanism Read Application Data Execute Unauthorized Code Or Commands
Applicable Platforms
Technologies: AI/ML, Web Based, Web Server
Likelihood of Exploit: High
View CWE Details
1021

Improper Restriction of Rendered UI Layers or Frames

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Gain Privileges Or Assume Identity Bypass Protection Mechanism Read Application Data Modify Application Data
Applicable Platforms
Technologies: Not Technology-Specific, Web Based
View CWE Details
https://github.com/open-webui/open-webui/commit/65a5fad7b97…
https://github.com/open-webui/open-webui/commit/65a5fad7b97db99d490d81f4e086028…
https://github.com/open-webui/open-webui/pull/26907
https://github.com/open-webui/open-webui/pull/26907
https://github.com/open-webui/open-webui/releases/tag/v0.11…
https://github.com/open-webui/open-webui/releases/tag/v0.11.0
https://github.com/open-webui/open-webui/security/advisorie…
https://github.com/open-webui/open-webui/security/advisories/GHSA-3xpf-xq7r-v8c5