CVE-2026-2733: Red Hat Build Of Keycloak

Low severity, CVSS 3.8. EPSS: 0.4% chance of exploitation in the next 30 days.

A flaw was identified in the Docker v2 authentication endpoint of Keycloak, where tokens continue to be issued even after a Docker registry client has been administratively disabled. This means that turning the client “Enabled” setting to OFF does not fully prevent access. As a result, previously valid credentials can still be used to obtain authentication tokens. This weakens administrative controls and could allow unintended access to container registry resources.

Affected products

• Red Hat Red Hat Build Of Keycloak
• Red Hat Red Hat Build Of Keycloak 26.4: before 26.4.10-1 (fixed in 26.4.10-1); before 26.4-12 (fixed in 26.4-12)
• Red Hat Red Hat Build Of Keycloak 26.4.10
• Red Hat Red Hat JBoss Enterprise Application Platform 8
• Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
• Red Hat Red Hat Single Sign-On 7

Published 2026-02-19. Last modified 2026-06-17.