{"timestamp":"2026-07-17T17:01:59.231875Z","id":"CVE-2026-16103","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

A flaw was found in the keycloak-services component of Keycloak. This issue is an incomplete fix for CVE-2026-9798, where brute-force protection checks were added to the Client-Initiated Backchannel Authentication (CIBA) initiation handler but were omitted from the token redemption handler. This allows an attacker with valid client credentials to obtain access and refresh tokens for a user account that has been locked due to brute-force protection, provided the authentication request was started before the lockout occurred and was approved by the user.

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

https://access.redhat.com/security/cve/CVE-2026-16103

https://bugzilla.redhat.com/show_bug.cgi?id=2501736

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