CVE-2026-3009

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

8.1 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://access.redhat.com/errata/RHSA-2026:3947 Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:3948 Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-3009 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2441867 Issue Tracking Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:build_of_keycloak:26.4:*:*:*:*:*:*:*
cpe:2.3:a:redhat:build_of_keycloak:26.4.10:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:8.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*
History

10 Mar 2026, 17:04

Type Values Removed Values Added
CWE CWE-863
First Time Redhat
Redhat jboss Enterprise Application Platform
Redhat single Sign-on
Redhat jboss Enterprise Application Platform Expansion Pack
Redhat build Of Keycloak
References () https://access.redhat.com/errata/RHSA-2026:3947 - () https://access.redhat.com/errata/RHSA-2026:3947 - Vendor Advisory
References () https://access.redhat.com/errata/RHSA-2026:3948 - () https://access.redhat.com/errata/RHSA-2026:3948 - Vendor Advisory
References () https://access.redhat.com/security/cve/CVE-2026-3009 - () https://access.redhat.com/security/cve/CVE-2026-3009 - Vendor Advisory
References () https://bugzilla.redhat.com/show_bug.cgi?id=2441867 - () https://bugzilla.redhat.com/show_bug.cgi?id=2441867 - Issue Tracking, Vendor Advisory
CPE cpe:2.3:a:redhat:build_of_keycloak:26.4:*:*:*:*:*:*:*
cpe:2.3:a:redhat:build_of_keycloak:26.4.10:*:*:*:*:*:*:*
cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:8.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:*
Summary
  • (es) Una falla de seguridad en el endpoint IdentityBrokerService.performLogin de Keycloak permite que la autenticación proceda usando un Proveedor de Identidad (IdP) incluso después de haber sido deshabilitado por un administrador. Un atacante que conoce el alias del IdP puede reutilizar una solicitud de inicio de sesión generada previamente para eludir la restricción administrativa. Esto socava la aplicación del control de acceso y puede permitir la autenticación no autorizada a través de un proveedor externo deshabilitado.

05 Mar 2026, 20:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:3947 -
  • () https://access.redhat.com/errata/RHSA-2026:3948 -

05 Mar 2026, 19:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-05 19:16

Updated : 2026-03-10 17:04

NVD link : CVE-2026-3009

Mitre link : CVE-2026-3009

CVE.ORG link : CVE-2026-3009

JSON object : View

Products Affected

redhat

  • single_sign-on
  • jboss_enterprise_application_platform_expansion_pack
  • jboss_enterprise_application_platform
  • build_of_keycloak
CWE
CWE-285

Improper Authorization

CWE-863

Incorrect Authorization