keycloak-services: Keycloak: Unauthorized access via improper validation of encrypted SAML assertions

A flaw was found in Keycloak. Keycloak's Security Assertion Markup Language SAML broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response. Thi...

keycloak: Keycloak: Denial of Service due to excessive SAMLRequest decompression

A flaw was found in Keycloak. An unauthenticated remote attacker can trigger an application level Denial of Service DoS by sending a highly compressed SAMLRequest through the SAML Redirect Binding. The server fails to enforce size limits during DEFLATE decompression, leading to an OutOfMemoryErro...

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...

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...

Important: Red Hat Security Advisory: Red Hat build of Keycloak 26.4.10 Update

New Red Hat build of Keycloak 26.4.10 packages are available from the Customer Portal Red Hat build of Keycloak 26.4.10 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...

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...

keycloak: Keycloak Authorization Header Parsing Leading to Potential Security Control Bypass

A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the "Bearer" authentication scheme. It accepts non-standard characters such as tabs as separators and tolerates case variations that deviate from RFC 6750 specifications...

org.keycloak/keycloak-services: Keycloak: Missing Check on Disabled Client for Docker Registry Protocol

A flaw was identified in the Docker v2 authentication endpoint of Keycloak, where tokens continue to be issued even after a Docker registry client has been administratively disabled. This means that turning the client “Enabled” setting to OFF does not fully prevent access. As a result, previously...

CVE-2026-3047

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...

CVE-2026-3047

A flaw in Keycloak’s SAML broker (org.keycloak.broker.saml) allows a disabled SAML client, when configured as an IdP-initiated broker landing target, to complete the login flow and establish an SSO session. This can let a remote attacker access other enabled clients without re-authenticating, eff...

CVE-2026-3047

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...

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 ...

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 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...

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

New images are available for Red Hat build of Keycloak 26.2.14 and Red Hat build of Keycloak 26.2.14 Operator, running on OpenShift Container Platform Red Hat build of Keycloak is an integrated sign-on solution, available as a Red Hat JBoss Middleware for OpenShift containerized image. The Red Ha...

keycloak-services: Keycloak: Unauthorized access via improper validation of encrypted SAML assertions

A flaw was found in Keycloak. Keycloak's Security Assertion Markup Language SAML broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response. Thi...

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...

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...