Описание
A flaw was found in the Micrometer user-event metrics listener of Keycloak, a solution for integrated identity and access management. The issue occurs when the listener is configured to include the idp tag. An unauthenticated attacker can send requests to the identity broker login endpoint using arbitrary provider aliases, causing the system to create an unlimited number of metric time series. This can lead to excessive memory consumption and degrade the performance of both the server and its monitoring tools.
Отчет
The Red Hat Product Security team has assessed the severity of this vulnerability as Moderate, given that it requires the Micrometer user-event metrics listener to be explicitly enabled with the idp tag configuration. Successful exploitation allows an attacker to cause resource exhaustion and degrade monitoring performance by creating an unbounded number of metric time series. The vulnerability's root cause is a lack of cardinality capping for the idp tag in the metrics event listener.
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 Single Sign-On 7 | keycloak-services | Not affected | ||
| Red Hat build of Keycloak 26.6.8 | keycloak-services | Fixed | RHSA-2026:95761 | 06.11.2026 |
| Red Hat build of Keycloak 26.6.8 | rhbk/keycloak-rhel9 | Fixed | RHSA-2026:95761 | 06.11.2026 |
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Дополнительная информация
Статус:
EPSS
3.7 Low
CVSS3
Связанные уязвимости
A flaw was found in the Micrometer user-event metrics listener of Keycloak, a solution for integrated identity and access management. The issue occurs when the listener is configured to include the idp tag. An unauthenticated attacker can send requests to the identity broker login endpoint using arbitrary provider aliases, causing the system to create an unlimited number of metric time series. This can lead to excessive memory consumption and degrade the performance of both the server and its monitoring tools.
A flaw was found in the Micrometer user-event metrics listener of Keycloak, a solution for integrated identity and access management. The issue occurs when the listener is configured to include the idp tag. An unauthenticated attacker can send requests to the identity broker login endpoint using arbitrary provider aliases, causing the system to create an unlimited number of metric time series. This can lead to excessive memory consumption and degrade the performance of both the server and its monitoring tools.
A flaw was found in the Micrometer user-event metrics listener of Keyc ...
A flaw was found in the Micrometer user-event metrics listener of Keycloak, a solution for integrated identity and access management. The issue occurs when the listener is configured to include the idp tag. An unauthenticated attacker can send requests to the identity broker login endpoint using arbitrary provider aliases, causing the system to create an unlimited number of metric time series. This can lead to excessive memory consumption and degrade the performance of both the server and its monitoring tools.
ALT-PU-2026-18865: package `keycloak` update to version 26.8.1-alt2
EPSS
3.7 Low
CVSS3