Red Hat Multicluster Engine for Kubernetes Credentials Download Endpoint credentials InfraEnvStatus.ISODownloadURL cleartext storage

Summaryinfo

A vulnerability described as problematic has been identified in Red Hat Multicluster Engine for Kubernetes. This affects the function InfraEnvStatus.ISODownloadURL of the file /v2/clusters/{cluster_id}/credentials of the component Credentials Download Endpoint. Such manipulation leads to cleartext storage. This vulnerability is uniquely identified as CVE-2026-7163. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Red Hat Multicluster Engine for Kubernetes (unknown version) and classified as problematic. Affected by this issue is the function InfraEnvStatus.ISODownloadURL of the file /v2/clusters/{cluster_id}/credentials of the component Credentials Download Endpoint. The manipulation with an unknown input leads to a cleartext storage vulnerability. Using CWE to declare the problem leads to CWE-312. The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere. Impacted is confidentiality. CVE summarizes:

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.

The weakness was disclosed by Red Hat. The advisory is available at access.redhat.com. This vulnerability is handled as CVE-2026-7163 since 04/27/2026. The exploitation is known to be difficult. The attack may be launched remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/19/2026). This vulnerability is assigned to T1555 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Virtualization Software

Vendor

• Red Hat

Name

• Multicluster Engine for Kubernetes

License

• open-source

Website

• Vendor: https://www.redhat.com/

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