What’s Vulnerable › Vulnerabilities

CVE-2026-3009: Org.keycloak/keycloak-services: improper enforcement of disabled identity provider in identitybrokerservice (authentication bypass)

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-05 · updated 2026-09-14
• Weakness: CWE-863

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

• Red Hat build of Keycloak 26.4: 26.4, 26.4.10
• Red Hat JBoss EAP: 8.0
• RedHat Jboss Enterprise Application Platform Expansion Pack: all versions
• Red Hat Single Sign-On: 7.0

References

• https://access.redhat.com/errata/RHSA-2026:3947
• https://access.redhat.com/errata/RHSA-2026:3948
• https://access.redhat.com/security/cve/CVE-2026-3009
• https://bugzilla.redhat.com/show_bug.cgi?id=2441867
• https://access.redhat.com/errata/RHSA-2026:3947
• https://access.redhat.com/errata/RHSA-2026:3948
• https://access.redhat.com/security/cve/CVE-2026-3009
• https://bugzilla.redhat.com/show_bug.cgi?id=2441867
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3009.json

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