Missing Authorization Affecting open-webui package, versions [,0.9.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published17 May 2026
- disclosed14 May 2026
- creditnaruto3co
Introduced: 14 May 2026
NewCVE-2026-45399 (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 in the GET /api/tasks and POST /api/tasks/stop/{task_id} endpoints, which lack proper ownership checks. An attacker can enumerate and terminate background tasks belonging to other users by sending authenticated requests to these endpoints. This can result in widespread disruption of ongoing processes for all users in a multi-user environment.