CVE-2026-18218

Name of the Vulnerable Software and Affected Versions Keycloak (affected versions not specified)

Description A flaw exists in the TokenManager component of the Keycloak identity management service. When an administrator attempts to revoke tokens for a specific application (client) using a "not-before" policy, the revocation may be silently ignored if the overall security realm already has an older, non-zero revocation policy in place. This allows previously issued tokens to remain valid for refreshing sessions and accessing user information despite the administrator's attempt to invalidate them.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.