Red Hat Multicluster Engine for Kubernetes cluster-curator-controller CreateJob spec.install.overrideJob privileges management

Summaryinfo

A vulnerability, which was classified as very critical, was found in Red Hat Multicluster Engine for Kubernetes. This affects the function CreateJob of the component cluster-curator-controller. Executing a manipulation of the argument spec.install.overrideJob can lead to privileges management. This vulnerability appears as CVE-2026-73268. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as very critical was found in Red Hat Multicluster Engine for Kubernetes (affected version not known). This vulnerability affects the function CreateJob of the component cluster-curator-controller. The manipulation of the argument spec.install.overrideJob with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A flaw was found in the cluster-curator-controller component of multicluster engine (MCE). A tenant with create or update permissions on ClusterCurator resources can inject an arbitrary Job specification. This is possible because the CreateJob() function does not validate user-controlled input when unmarshaling the spec.install.overrideJob raw extension. Successful exploitation allows the injected Job to run with the controller's elevated privileges, leading to arbitrary code execution and privilege escalation, potentially accessing cluster-wide secrets.

The advisory is shared for download at access.redhat.com. This vulnerability was named CVE-2026-73268 since 08/11/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/12/2026). The MITRE ATT&CK project declares the attack technique as T1068.

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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