Red Hat Advanced Cluster Management for Kubernetes Submariner Operator improper authorization

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Red Hat Advanced Cluster Management for Kubernetes. Impacted is an unknown function of the component Submariner Operator. The manipulation leads to improper authorization. This vulnerability is uniquely identified as CVE-2026-66782. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Red Hat Advanced Cluster Management for Kubernetes (affected version unknown) and classified as very critical. This issue affects an unknown functionality of the component Submariner Operator. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in the Submariner operator. This vulnerability allows for the exposure of a long-lived broker service account (SA) bearer token within the Submariner Custom Resource (CR) specification. An attacker with access to the cluster's etcd database or through `kubectl get` commands could obtain this token. The possession of this token grants full control over the mesh network, enabling unauthorized management of network resources such as endpoints and secrets.

It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2026-66782 since 07/27/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/18/2026). The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

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

• Advanced Cluster Management for Kubernetes

License

• open-source

Website

• Vendor: https://www.redhat.com/

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