EUVD-2026-12690

A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider IdP to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker logins even when the SAML Identity...

GHSA-X4P7-7CHP-64HQ Keycloak: Unauthorized authentication via disabled SAML Identity Provider

A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider IdP to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker logins even when the SAML Identity...

CVE-2026-2603

CVE-2026-2603 affects Keycloak: an attacker can bypass security by sending a valid SAML response from an external IdP to the Keycloak SAML endpoint for IdP-initiated broker logins, enabling unauthorized authentication. The issue is described across multiple sources (NVD/EUVD/GHSA) with a CVSS v3....

CVE-2026-2603

A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider IdP to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker logins even when the SAML Identity...

Improper Authentication

ZITADEL is vulnerable to Improper Authentication. The vulnerability is due to improper enforcement of organization login policies during the federation auto-linking process, which allows an attacker to authenticate through a disabled identity provider and link their external identity to an existi...

Keycloak allows authentication using an Identity Provider (IdP) even after it has been disabled by an administrator

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...

EUVD-2026-9864

A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language SAML client is configured as an Identity Provider IdP-initiated broker landing target, it can still complete the login process and establish a Single Sign-On SSO session. This allows a remote attacker...

EUVD-2026-9863

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...

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...

org.keycloak.broker.saml: Keycloak SAML broker: Authentication bypass due to disabled SAML client completing IdP-initiated login

A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language SAML client is configured as an Identity Provider IdP-initiated broker landing target, it can still complete the login process and establish a Single Sign-On SSO session. This allows a remote attacker...

org.keycloak/keycloak-services: Improper Enforcement of Disabled Identity Provider in IdentityBrokerService (Authentication Bypass)

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...

keycloak: Keycloak: Unauthorized authentication via disabled SAML Identity Provider

A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider IdP to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker logins even when the SAML Identity...

CVE-2026-3009 Org.keycloak/keycloak-services: improper enforcement of disabled identity provider in identitybrokerservice (authentication bypass)

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...

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...

CVE-2026-3009

Keycloak’s IdentityBrokerService.performLogin path is vulnerable to an authentication bypass where an attacker can reuse a previously generated login request to authenticate via a disabled IdP. Multiple sources (Red Hat advisories RHSA-2026:3947/3948, GHSA entry) describe Improper Enforcement of ...

keycloak: Keycloak: Unauthorized authentication via disabled SAML Identity Provider

A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider IdP to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker logins even when the SAML Identity...

Important: Red Hat Security Advisory: Red Hat build of Keycloak 26.2.14 Update

New Red Hat build of Keycloak 26.2.14 packages are available from the Customer Portal Red Hat build of Keycloak 26.2.14 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. Security...

PT-2026-23493

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description A flaw exists in the IdentityBrokerService.performLogin endpoint of Keycloak that allows authentication to continue using an Identity Provider IdP even after it has been administratively...

Keycloak fails to verify if an Identity Provider (IdP) is enabled before issuing tokens

A flaw was found in Keycloak. A vulnerability exists in the jwt-authorization-grant flow where the server fails to verify if an Identity Provider IdP is enabled before issuing tokens. The issuer lookup mechanism lookupIdentityProviderFromIssuer retrieves the IdP configuration but does not filter...

org.keycloak.protocol.oidc.grants: Disabled identity providers are still accepted for JWT Authorization Grant

A flaw was found in Keycloak. A vulnerability exists in the jwt-authorization-grant flow where the server fails to verify if an Identity Provider IdP is enabled before issuing tokens. The issuer lookup mechanism lookupIdentityProviderFromIssuer retrieves the IdP configuration but does not filter...