CVE-2026-7163
Full vulnerability record from the local CVENow database.
Description
A vulnerability in the assisted-service REST API, an optional Assisted Installer (assisted-service) component in the Multicluster Engine (MCE), allows an authenticated user with minimal namespace-scoped privileges to obtain administrative credentials for arbitrary clusters provisioned through the hub. The credentials download endpoint (GET /v2/clusters/{cluster_id}/credentials, which returns the kubeadmin password) and the kubeconfig download endpoint are operational in AUTH_TYPE=local mode, the only authentication mode available in on-premises ACM/MCE hub deployments. The local authenticator unconditionally grants full administrative access to any request bearing a valid JWT, with no per-endpoint restrictions. A valid local JWT is embedded as a plaintext query parameter in InfraEnvStatus.ISODownloadURL and is readable by any user who has get rights on an InfraEnv object in their own namespace. The affected components ship as part of Multicluster Engine (MCE). The Red Hat Advanced Cluster Management (ACM) deployments that include MCE are equally affected. This issue does not affect the hosted SaaS offering (console.redhat.com), which uses a different authentication mode. Successful exploitation gives the attacker the kubeadmin password and kubeconfig for any OpenShift cluster provisioned through the affected hub, granting unrestricted root-level administrative access to those spoke clusters.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
Published
2026-04-30 14:16:36.093000
Last modified
2026-10-26 22:10:00.163000
View original CVE JSON
{
"id": "CVE-2026-7163",
"sourceIdentifier": "[email protected]",
"published": "2026-04-30T14:16:36.093",
"lastModified": "2026-10-26T22:10:00.163",
"vulnStatus": "Modified",
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"value": "A vulnerability in the assisted-service REST API, an optional Assisted Installer (assisted-service) component in the Multicluster Engine (MCE), allows an authenticated user with minimal namespace-scoped privileges to obtain administrative credentials for arbitrary clusters provisioned through the hub. \n\nThe credentials download endpoint (GET /v2/clusters/{cluster_id}/credentials, which returns the kubeadmin password) and the kubeconfig download endpoint are operational in AUTH_TYPE=local mode, the only authentication mode available in on-premises ACM/MCE hub deployments. The local authenticator unconditionally grants full administrative access to any request bearing a valid JWT, with no per-endpoint restrictions. A valid local JWT is embedded as a plaintext query parameter in InfraEnvStatus.ISODownloadURL and is readable by any user who has get rights on an InfraEnv object in their own namespace.\n\nThe affected components ship as part of Multicluster Engine (MCE). The Red Hat Advanced Cluster Management (ACM) deployments that include MCE are equally affected.\nThis issue does not affect the hosted SaaS offering (console.redhat.com), which uses a different authentication mode.\n\nSuccessful exploitation gives the attacker the kubeadmin password and kubeconfig for any OpenShift cluster provisioned through the affected hub, granting unrestricted root-level administrative access to those spoke clusters."
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"value": "Una vulnerabilidad en la API REST de assisted-service, un componente opcional de Assisted Installer (assisted-service) en Multicluster Engine (MCE), permite a un usuario autenticado con privilegios mínimos de ámbito de namespace obtener credenciales administrativas para clústeres arbitrarios aprovisionados a través del hub.\n\nEl endpoint de descarga de credenciales (GET /v2/clusters/{cluster_id}/credentials, que devuelve la contraseña de kubeadmin) y el endpoint de descarga de kubeconfig están operativos en modo AUTH_TYPE=local, el único modo de autenticación disponible en despliegues de hub ACM/MCE on-premises. El autenticador local concede acceso administrativo completo incondicionalmente a cualquier solicitud que contenga un JWT válido, sin restricciones por endpoint. Un JWT local válido está incrustado como un parámetro de consulta de texto plano en InfraEnvStatus.ISODownloadURL y es legible por cualquier usuario que tenga derechos de lectura (get rights) sobre un objeto InfraEnv en su propio namespace.\n\nLos componentes afectados se distribuyen como parte de Multicluster Engine (MCE). Los despliegues de Red Hat Advanced Cluster Management (ACM) que incluyen MCE se ven igualmente afectados.\nEste problema no afecta la oferta SaaS alojada (console.redhat.com), que utiliza un modo de autenticación diferente.\n\nLa explotación exitosa otorga al atacante la contraseña de kubeadmin y el kubeconfig para cualquier clúster OpenShift aprovisionado a través del hub afectado, concediendo acceso administrativo de nivel raíz sin restricciones a esos clústeres spoke."
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