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Medium · 4.9 CVE-2026-89298 EUVD-2026-76104GHSA-386r-m7rr-67p4

Keycloak-services: keycloak-services: confidential client secret disclosed to view-clients role via client registration get

Published Sep 11, 2026 · Updated Nov 6, 2026 · Assigned by redhat

Description

A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access management solution. The issue occurs when a user with the view-clients role accesses the client registration endpoint to retrieve client details. Due to a failure to mask sensitive information, the service returns the client's confidential secret in cleartext. This could allow a read-only administrator to obtain full access to the affected client's account and potentially escalate their privileges within the realm.

Affected products

VendorProductAffectedFixed
Red Hat Red Hat build of Keycloak 26.6.8 — —
Red Hat Red Hat Single Sign-On 7 — —

References