CVE-2026-107623: Red Hat Build Of Keycloak

Medium severity, CVSS 4.3. EPSS: 0.2% chance of exploitation in the next 30 days.

A flaw was found in the OIDC Dynamic Client Registration (DCR) component of Keycloak. A bug in the response serialization causes the backchannel logout offline token revocation setting to be omitted from responses. When a client performs a standard update, this missing information causes the setting to be silently disabled. As a result, offline tokens may remain valid even after a user session is terminated via backchannel logout.

Affected products

• Red Hat Red Hat Build Of Keycloak
• Red Hat Red Hat Single Sign-On 7

Published 2026-10-08. Last modified 2026-10-08.