Missing Authorization Affecting open-webui package, versions [,0.9.0)
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- published9 May 2026
- disclosed8 May 2026
- creditClassic298
Introduced: 8 May 2026
NewCVE-2026-44556 (opens in a new tab)How to fix?
Upgrade open-webui to version 0.9.0 or higher.
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 sending crafted POST requests with arbitrary model IDs. This can lead to resource exhaustion, bypass of cost-tier or group-based restrictions, and unauthorized access to sensitive or expensive models.