CVE-2026-18967
No fix known EPSS <1%CVSS 6.4
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 assertion to replay it multiple times. Successful exploitation could allow an attacker to hijack a user's session and gain unauthorized access to the system as that user.
Products: Red Hat Build of Keycloak, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat Single Sign-On 7