MEDIUM 6.4 NVD
CVE-2026-18967
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
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.
References
- https://access.redhat.com/security/cve/CVE-2026-18967
- https://bugzilla.redhat.com/show_bug.cgi?id=2511604
This medium severity vulnerability with a CVSS score of 6.4 was published on 2026-08-06 via NVD.
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