CVE-2026-3009 Keycloak allows authentication using an Identity Provider (IdP) even after it has been disabled by an administrator
Attackers can authenticate via disabled identity providers in Keycloak by reusing login requests, bypassing administrative access controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-3009?
CVE-2026-3009 is a high-severity authentication bypass vulnerability in Redhat Build of Keycloak, published on 5 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2026-3009?
3 open source packages ship an affected version, including org.keycloak:keycloak-services and keycloak. It affects 4 products.
| Package | Affected | Fixed in |
|---|---|---|
org.keycloak:keycloak-services Maven | All versions | 26.5.5 |
org.keycloak:keycloak-services Maven | All versions | 26.5.5 |
keycloak Bitnami | From 26.4.0 | 26.4.1, 26.5.0 |
Products include Redhat Build of Keycloak, Redhat Jboss Enterprise Application Platform, Redhat Jboss Enterprise Application Platform Expansion Pack, Redhat Single Sign-On.
How do I fix CVE-2026-3009?
Upgrade org.keycloak:keycloak-services to 26.5.5 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-3009 being exploited?
There is no known exploitation of CVE-2026-3009 in the wild and no public exploit code.
Other vulnerabilities in Redhat Build of Keycloak
- CVE-2026-15572 Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation
- CVE-2026-3047 Keycloak SAML Broken has Authentication Bypass by Primary Weakness
- CVE-2026-15573 Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
- CVE-2026-16102 Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers
- CVE-2026-1609 Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users
Sources
Also known as BIT-keycloak-2026-3009, ECHO-8007-ba66-0c1a, GHSA-m297-3jv9-m927, MINI-4jcw-29m7-pv83, MINI-6hg8-vr8m-2gqr.