high8.1
CVE-2026-3009
Keycloak allows authentication using an Identity Provider (IdP) even after it has been disabled by an administrator
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.keycloak:keycloak-services | < 26.5.5 | 26.5.5 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redhat | Build Of Keycloak | All versions Versions 26.4, 26.4.10 |
| Redhat | Jboss Enterprise Application Platform | Version 8.0 |
| Redhat | Jboss Enterprise Application Platform Expansion Pack | All versions |
| Redhat | Single Sign-On | Version 7.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- 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
- https://github.com/advisories/GHSA-m297-3jv9-m927
- https://nvd.nist.gov/vuln/detail/CVE-2026-3009
- https://github.com/keycloak/keycloak/issues/46911
- https://github.com/keycloak/keycloak/commit/4fd5367e6cc28cfa68fb2240fc459c12b1fdbf2a
- https://github.com/keycloak/keycloak/releases/tag/26.5.5