EUVD-2026-53716

A flaw was found in the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused asserti...

CVE-2026-18967

CVE-2026-18967 affects Keycloak’s SAML broker component when configured as an IdP-initiated broker. The flaw: OneTimeUse in SAML assertions is not enforced, allowing an attacker to replay a valid, unused assertion multiple times. This can enable session hijacking and unauthorized access to the us...

CVE-2026-18967 Keycloak-services: keycloak-services: saml onetimeuse assertion replay in idp-initiated broker flow

A flaw was found in the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused asserti...