Vulnerability in Red Hat Build of Keycloak

[ Description ]Official description

A flaw was found in the Pushed Authorization Request PAR implementation of the keycloak-services component. The issue occurs when an authentication flow is restarted, which incorrectly clears the internal markers used to track PAR consumption while leaving the request active. This allows an attacker to reuse the same authorization request to obtain multiple access tokens, bypassing security requirements for single-use requests.

[ 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-Bund27 Oct 2026WID-SEC-2026-4191

  Keycloak: Multiple vulnerabilities Translated from German

  CVE-2026-117627CVE-2026-117688CVE-2026-118030+2 more CVEs

[ References ]References

• access.redhat.com/security/cve/CVE-2026-117859
• bugzilla.redhat.com/show_bug.cgi