CVE-2026-45396

Published: Mag 15, 2026 Last Modified: Mag 19, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,4
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: low
Availability: low

Description

AI Translation Available

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, the POST /api/v1/evaluations/feedback endpoint in Open WebUI v0.9.2 is vulnerable to mass assignment via FeedbackForm, which uses model_config = ConfigDict(extra='allow'). Due to an insecure dictionary merge order in insert_new_feedback(), an authenticated attacker can inject a user_id field in the request body that overwrites the server-derived value, creating feedback records attributed to any arbitrary user. This corrupts the model evaluation leaderboard (Elo ratings) and enables identity spoofing. This vulnerability is fixed in 0.9.5.

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
0,0005
Percentile
0,2th
Updated

EPSS Score Trend (Last 5 Days)

915

Improperly Controlled Modification of Dynamically-Determined Object Attributes

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Other
Potential Impacts:
Modify Application Data Execute Unauthorized Code Or Commands Varies By Context Alter Execution Logic
Applicable Platforms
Languages: Ruby, ASP.NET, PHP, Python, Not Language-Specific
View CWE Details
Application

Open Webui by Openwebui

Product Information
Vendor Openwebui
Product Open Webui
Version Range Affected
To 0.9.5 (exclusive)
cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/open-webui/open-webui/security/advisorie…
https://github.com/open-webui/open-webui/security/advisories/GHSA-rjmp-vjf2-qf4g
https://github.com/open-webui/open-webui/security/advisorie…
https://github.com/open-webui/open-webui/security/advisories/GHSA-rjmp-vjf2-qf4g