Описание
A flaw was identified in the Account REST API of Keycloak that allows a user authenticated at a lower security level to perform sensitive actions intended only for higher-assurance sessions. Specifically, an attacker who has already obtained a victim’s password can delete the victim’s registered MFA/OTP credential without first proving possession of that factor. The attacker can then register their own MFA device, effectively taking full control of the account. This weakness undermines the intended protection provided by multi-factor authentication.
Отчет
This MODERATE impact vulnerability in the Keycloak Account REST API allows an attacker with a victim's primary credentials to bypass multi-factor authentication (MFA). By exploiting insufficient validation of the authentication Level of Assurance (LoA), an attacker can delete a victim's registered MFA device and register their own, leading to full account takeover. This requires network access and valid credentials, but no user interaction.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options don't 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 | rhbk/keycloak-operator-bundle | Not affected | ||
| Red Hat Build of Keycloak | rhbk/keycloak-rhel9-operator | Not affected | ||
| Red Hat JBoss Enterprise Application Platform 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 | ||
| Red Hat build of Keycloak 26.4 | rhbk/keycloak-operator-bundle | Fixed | RHSA-2026:6478 | 02.04.2026 |
| Red Hat build of Keycloak 26.4 | rhbk/keycloak-rhel9 | Fixed | RHSA-2026:6478 | 02.04.2026 |
| Red Hat build of Keycloak 26.4 | rhbk/keycloak-rhel9-operator | Fixed | RHSA-2026:6478 | 02.04.2026 |
| Red Hat build of Keycloak 26.4.11 | rhbk/keycloak-rhel9 | Fixed | RHSA-2026:6477 | 02.04.2026 |
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Дополнительная информация
Статус:
EPSS
4.2 Medium
CVSS3
Связанные уязвимости
A flaw was identified in the Account REST API of Keycloak that allows a user authenticated at a lower security level to perform sensitive actions intended only for higher-assurance sessions. Specifically, an attacker who has already obtained a victim’s password can delete the victim’s registered MFA/OTP credential without first proving possession of that factor. The attacker can then register their own MFA device, effectively taking full control of the account. This weakness undermines the intended protection provided by multi-factor authentication.
A flaw was identified in the Account REST API of Keycloak that allows ...
Keycloak: Improper Access Control Leading to MFA Deletion and Account Takeover in Keycloak Account REST API
EPSS
4.2 Medium
CVSS3