Описание
A flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication. The issue occurs because the IdP-initiated Single Sign-On endpoint fails to check if a provider is restricted to account linking only. This allows an attacker with control over a linked upstream identity to bypass login restrictions and gain full access to a local user account.
Отчет
The Red Hat Product Security team has assessed the severity of this vulnerability as Important, given that it allows for an authentication bypass. Successful exploitation allows an attacker to obtain a full authenticated session as a linked local user, bypassing administrative restrictions. The vulnerability's root cause is the lack of enforcement of the link-only configuration within the SAML IdP-initiated SSO endpoint.
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 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 | ||
| Red Hat build of Keycloak 26.4 | rhbk/keycloak-operator-bundle | Fixed | RHSA-2026:50847 | 05.08.2026 |
| Red Hat build of Keycloak 26.4 | rhbk/keycloak-rhel9 | Fixed | RHSA-2026:50847 | 05.08.2026 |
| Red Hat build of Keycloak 26.4 | rhbk/keycloak-rhel9-operator | Fixed | RHSA-2026:50847 | 05.08.2026 |
| Red Hat build of Keycloak 26.4.14 | keycloak-services | Fixed | RHSA-2026:50846 | 05.08.2026 |
| Red Hat build of Keycloak 26.4.14 | rhbk-openshift-rhel9/rhbk-openshift-rhel9 | Fixed | RHSA-2026:50846 | 05.08.2026 |
| Red Hat build of Keycloak 26.6 | rhbk/keycloak-operator-bundle | Fixed | RHSA-2026:50849 | 05.08.2026 |
| Red Hat build of Keycloak 26.6 | rhbk/keycloak-rhel9 | Fixed | RHSA-2026:50849 | 05.08.2026 |
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Дополнительная информация
Статус:
EPSS
7.4 High
CVSS3
Связанные уязвимости
A flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication. The issue occurs because the IdP-initiated Single Sign-On endpoint fails to check if a provider is restricted to account linking only. This allows an attacker with control over a linked upstream identity to bypass login restrictions and gain full access to a local user account.
A flaw was found in the SAML broker component of Keycloak, which is us ...
A flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication. The issue occurs because the IdP-initiated Single Sign-On endpoint fails to check if a provider is restricted to account linking only. This allows an attacker with control over a linked upstream identity to bypass login restrictions and gain full access to a local user account.
EPSS
7.4 High
CVSS3