Описание
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.
Отчет
The Red Hat Product Security team has assessed the severity of this vulnerability as Moderate, given that successful exploitation allows an attacker to obtain a valid user session for an account that should be temporarily disabled by brute-force protection. Successful exploitation requires a CIBA request to be in flight prior to the account lockout and necessitates user interaction for approval. The vulnerability's root cause is the omission of brute-force protector checks in the CIBA grant redemption code path.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Build of Keycloak | keycloak-services | Affected | ||
| Red Hat Build of Keycloak | rhbk-keycloak-rhel9/rhbk-keycloak-rhel9 | Affected | ||
| Red Hat Build of Keycloak | rhbk-openshift-rhel9/rhbk-openshift-rhel9 | Affected | ||
| Red Hat Data Grid 8 | keycloak-services | Not affected | ||
| Red Hat JBoss Enterprise Application Platform Expansion Pack | keycloak-services | Not affected | ||
| Red Hat Single Sign-On 7 | keycloak-services | Not affected |
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Дополнительная информация
Статус:
4.3 Medium
CVSS3
Связанные уязвимости
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.
A flaw was found in the keycloak-services component of Keycloak. This ...
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.
4.3 Medium
CVSS3