Open WebUI: Arena task endpoints can bypass underlying model access controls

Summary An authenticated non-admin user with read access to an arena wrapper model can reach a restricted underlying model through task endpoints such as /api/v1/tasks/moa/completions. The normal chat route resolves arena models before the final chat dispatch and therefore re-checks the selected...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization in the generatechatcompletion process. An attacker can gain unauthorized access to restricted underlying models by submitting crafted requests to task endpoints that leverage readable...

PT-2026-56888

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.8.12 through 0.9.x Description An authenticated non-admin user with read access to an arena wrapper model can access a restricted underlying model. This occurs because task endpoints, such as...

CVE-2026-46645 SQLAdmin: Authorization Bypass on `ajax_lookup`

SQLAdmin is a flexible Admin interface for SQLAlchemy models. Prior to version 0.25.1, the ajaxlookup endpoint in application.py bypasses the isaccessible access control check that all other endpoints enforce. If a developer restricts model access by overriding isaccessible, an authenticated user...

CVE-2026-45365

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, an internal-only bypassfilter parameter is exposed on the /openai/chat/completions and /ollama/api/chat HTTP endpoints via FastAPI query string binding, allowing any authenticated...

CVE-2026-45365 Open WebUI: Authenticated users can bypass model access control via exposed query parameter

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, an internal-only bypassfilter parameter is exposed on the /openai/chat/completions and /ollama/api/chat HTTP endpoints via FastAPI query string binding, allowing any authenticated...

Open WebUI 授权问题漏洞

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI under the open source Open WebUI project. Versions of Open WebUI prior to 0.8.11 had an authorization issue vulnerability. This vulnerability stemmed from the internal bypassfilter parameter being exposed through FastA...

Improper Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Improper Authorization via the bypassfilter parameter in the HTTP query string, which is unintentionally exposed in the route handler. An attacker can gain unauthorized access to restricted models by appendin...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization in the generatecompletion, embed, embeddings, and showmodelinfo functions. An attacker can access restricted model information and consume compute resources by sending crafted API reques...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization through the /responses endpoint, which fails to enforce per-model access control. An attacker can interact with any configured model, including those restricted by administrators, by...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization in the basemodelid process. An attacker can gain unauthorized access to restricted models by creating a new model that chains to a restricted base model and invoking it, causing the serv...