CVE-2026-1190 Org.keycloak/keycloak-services: keycloak saml brokering: response delay due to unchecked notonorafter in subjectconfirmationdata

A flaw was found in Keycloak's SAML brokering functionality. When Keycloak is configured as a client in a Security Assertion Markup Language SAML setup, it fails to validate the NotOnOrAfter timestamp within the SubjectConfirmationData. This allows an attacker to delay the expiration of SAML...

CVE-2026-1190

Summary: CVE-2026-1190 affects Keycloak when used as a SAML client; it fails to validate the NotOnOrAfter timestamp in SubjectConfirmationData, allowing an attacker to delay SAML response expiration and potentially extend valid session duration. What’s affected: Keycloak’s SAML brokering function...

PT-2026-4811

A flaw was found in Keycloak's SAML brokering functionality. When Keycloak is configured as a client in a Security Assertion Markup Language SAML setup, it fails to validate the NotOnOrAfter timestamp within the SubjectConfirmationData. This allows an attacker to delay the expiration of SAML...

Keycloak security vulnerabilities

Keycloak is an open-source identity and access management solution developed by Keycloak. Keycloak has a security vulnerability that stems from the lack of checking the value “NotOnOrAfter” in SubjectConfirmationData, which may lead to delayed responses...