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8.1 High

CVE-2026-3009 A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an…

Description

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.

Affected products and versions

Product Affected versions Fixed in
Red Hat build of Keycloak 26.4 26.4 earliest → < 26.4-12 26.4-12
Red Hat build of Keycloak 26.4.10 Versions not published
Red Hat Single Sign-On 7 Versions not published
Red Hat JBoss Enterprise Application Platform 8 Versions not published
Red Hat JBoss Enterprise Application Platform Expansion Pack Versions not published

References

Timeline

  1. Published
  2. Last modified

Other CVEs of Red Hat build of Keycloak 26.4

The 87 CVEs of Red Hat build of Keycloak 26.4 →
CVE-2026-19607 A flaw was found in the first-broker-login flow of the keycloak-services component 5.3 Medium CVE-2026-17526 Keycloak is an open-source identity and access management solution 7.2 High CVE-2026-79651 A flaw was found in the theme localization endpoints of the keycloak-services component, which is the core service… 7.5 High CVE-2026-74909 Keycloak provides a policy enforcer to protect applications by matching incoming web requests against defined security… 8.1 High
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