CVE-2026-3009
High
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.
SeverityHigh
CVSS8.1
Exploit probability—
Product
Redhat Build Of Keycloak
PublishedMar 5, 2026
First seenMar 5, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- org.keycloak:keycloak-services26.5.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redhat build_of_keycloak | No range specified, 26.4, 26.4.10 | — |
| redhat jboss_enterprise_application_platform | 8.0 | — |
| redhat jboss_enterprise_application_platform_expansion_pack | No range specified | — |
| redhat single_sign-on | 7.0 | — |
| org.keycloak:keycloak-servicesMaven | v < 26.5.5 | 26.5.5 |
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