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    CVE-2026-3009

    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.

    Published:Mar 5, 2026
    Last Modified:Apr 16, 2026
    EPS:Mar 5, 2026
    EPSS Score:0.00032
    CVSS Score:8.1

    Affected Products

    Vendor
    Redhat
    Product
    Build Keycloak
    Vendor
    Redhat
    Product
    Build Of Keycloak
    Vendor
    Redhat
    Product
    Jboss Enterprise Application Platform
    Vendor
    Redhat
    Product
    Jboss Enterprise Application Platform Expansion Pack
    Vendor
    Redhat
    Product
    Jbosseapxp
    Vendor
    Redhat
    Product
    Red Hat Single Sign On
    Vendor
    Redhat
    Product
    Single Sign-on

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-17615 (CVSS 7.5) — A flaw was found in RESTEasy's SourceProvider. This vulnerability allows an unauthenticated attacker to perfor…
    CVE-2026-82968 (CVSS 6.4) — A flaw was found in the first-broker-login flow of the Keycloak identity management service. When a user links…
    CVE-2026-19611 (CVSS 7.4) — A flaw was found in WildFly Elytron. Password hashing and verification normalize input with Unicode NFKC, whic…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High