Medium severity6.4NVD Advisory· Published Aug 6, 2026· Updated Aug 10, 2026
CVE-2026-18967
CVE-2026-18967
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*
- cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
2- access.redhat.com/security/cve/CVE-2026-18967nvdVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdPermissions Required
News mentions
1- Keycloak Services: Five Vulnerabilities Including High-Severity Flaws Disclosed TogetherVypr Intelligence · Aug 6, 2026