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GHSA-m297-3jv9-m927

Keycloak allows authentication using an Identity Provider (IdP) even after it has been disabled by an administrator

Source: GitHub Advisory Database (reviewed) High CVE-2026-3009

Packages

EcosystemPackageAffectedFixed in
Maven org.keycloak:keycloak-services < 26.5.5 26.5.5

Details

As written in the advisory (Markdown source, shown as plain text).

A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an Identity Provider (IdP) even after it has been disabled by an administrator. An attacker who knows the IdP alias can reuse a previously generated login request to bypass the administrative restriction. This undermines access control enforcement and may allow unauthorized authentication through a disabled external provider.

References

External links from the advisory. They lead to third-party sites.