Origin Validation Error Affecting open-webui package, versions [,0.9.6)
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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Test your applications- Snyk IDSNYK-PYTHON-OPENWEBUI-17400341
- published22 Jun 2026
- disclosed17 Jun 2026
- creditJorianWoltjer, grumpinout1
Introduced: 17 Jun 2026
NewCVE-2026-54007 (opens in a new tab)How to fix?
Upgrade open-webui to version 0.9.6 or higher.
Overview
open-webui is an Open WebUI
Affected versions of this package are vulnerable to Origin Validation Error through the postMessage process. An attacker can execute unauthorized actions and trigger backend API calls under the victim's authenticated session by sending crafted cross-origin messages to the chat interface. This is only exploitable if the victim is authenticated in the browser with a valid session token.