User Impersonation Affecting doorkeeper-openid_connect package, versions <1.10.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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-RUBY-DOORKEEPEROPENIDCONNECT-17177959
- published5 Jun 2026
- disclosed4 Jun 2026
- creditKenta Ishizaki
Introduced: 4 Jun 2026
NewCVE-2026-44476 (opens in a new tab)How to fix?
Upgrade doorkeeper-openid_connect to version 1.10.0 or higher.
Overview
doorkeeper-openid_connect is an OpenID Connect extension for Doorkeeper.
Affected versions of this package are vulnerable to User Impersonation via the Dynamic Client Registration feature that treats client_secret_basic and client_secret_post parameters as confidential: false which allows blank/missing secret as valid for non-confidential clients. An attacker can gain unauthorized access by authenticating as a dynamically-registered client using only the client_id, without needing the client_secret. This is only exploitable if the Dynamic Client Registration feature is explicitly enabled.