PYSEC-2026-3543 Open WebUI's API key endpoint restrictions bypassed via `x-api-key` header — full message processing on restricted endpoints

Summary Open WebUI allows admins to restrict which API endpoints an API key can access. When an API key is restricted from /api/v1/messages, requests using the Authorization: Bearer sk-... header are correctly blocked with 403. However, the same key sent via the x-api-key header bypasses the...

CVE-2026-45339

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, Open WebUI allows admins to restrict which API endpoints an API key can access. When an API key is restricted from /api/v1/messages, requests using the Authorization: Bearer sk-...

CVE-2026-45339 Open WebUI: API key endpoint restrictions bypassed via `x-api-key` header — full message processing on restricted endpoints

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, Open WebUI allows admins to restrict which API endpoints an API key can access. When an API key is restricted from /api/v1/messages, requests using the Authorization: Bearer sk-...

CVE-2026-40525

OpenViking prior to commit c7bb167 contains an authentication bypass in the VikingBot OpenAPI HTTP route surface. If api_key is unset or empty, authentication checks fail and remote attackers with network access can invoke privileged bot-control functionality without a valid X-API-Key header, inc...

CVE-2024-8954

In composiohq/composio version 0.5.10, the API does not validate the x-api-key header's value during the authentication step. This vulnerability allows an attacker to bypass authentication by providing any random value in the x-api-key header, thereby gaining unauthorized access to the server...