CVE-2026-7163

[CVE catalog]

Severity

Medium · CVSS 6.1CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N

Published

Apr 29, 2026, 6:59:14 AM UTC

Source

[NVD] · [CVE record]

EPSS

0.19% · Oct 25, 2026

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. assisted-service: assisted-service: Authenticated users can gain administrative access to OpenShift clusters via credential disclosure This is an Important vulnerability affecting on-premises deployments of Multicluster Engine (MCE) and Red Hat Advanced Cluster Management (ACM). An authenticated user with namespace-scoped privileges can exploit a flaw in the `assisted-service` REST API to retrieve administrative credentials for OpenShift clusters provisioned through the hub. This grants unrestricted root-level administrative access to affected spoke clusters, stemming from the `AUTH_TYPE=local` mode's unconditional administrative access with a valid local JWT, which is exposed in plaintext. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.