Allocation of Resources Without Limits or Throttling Affecting open-webui package, versions [0.9.0,0.11.1)
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-20158713
- published27 Sept 2026
- disclosed10 Sept 2026
- creditUnknown
Introduced: 10 Sep 2026
NewCVE-2026-87011 (opens in a new tab)How to fix?
Upgrade open-webui to version 0.11.1 or higher.
Overview
open-webui is an Open WebUI
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the POST /oauth/backchannel-logout process in the OIDC back-channel logout handler when unauthenticated requests trigger repeated network fetches for the provider's discovery document and signing keys without caching. An attacker can cause the server to become unresponsive by sending multiple crafted requests, leading to event loop stalls and denial of service. This is only exploitable if ENABLE_OAUTH_BACKCHANNEL_LOGOUT is set to true and at least one OIDC provider is configured.