Security Advisory

CVE-2026-18967

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-06 05:33:17

Last updated 2026-08-06 17:31:57

Assigner redhat

CVSS score not scored

State PUBLISHED

Description

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.

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