Vulnerability in Red Hat Build of Keycloak

[ Description ]Official description

A flaw was found in the Level of Authentication enforcement mechanism of Keycloak, an identity and access management solution. The issue occurs when a client specifically requires a higher security level for a user who already has an active session at a lower level. Due to a logic error in how session re-evaluations are handled, Keycloak may incorrectly issue a token at the lower security level instead of enforcing the required higher level, potentially allowing unauthorized access to sensitive resources that rely on these security claims.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund23 Sep 2026WID-SEC-2026-3558

  Keycloak: Multiple vulnerabilities Translated from German

  CVE-2026-97176CVE-2026-96445CVE-2026-97177+1 more CVEs

[ References ]References

• access.redhat.com/security/cve/CVE-2026-97176
• bugzilla.redhat.com/show_bug.cgi