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.

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Fixes

Solution

No solution given by the vendor.


Workaround

To mitigate this issue, implement strict Role-Based Access Control (RBAC) policies to limit create and update permissions on `clustercurators.cluster.open-cluster-management.io` resources to trusted administrators only. This restricts the ability of less privileged tenants to exploit the vulnerability and escalate privileges within the Kubernetes environment.

History

Wed, 12 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 12 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Cluster-curator-controller: cluster-curator-controller: spec.install.overridejob allows arbitrary job spec injection
First Time appeared Redhat
Redhat multicluster Engine
Weaknesses CWE-94
CPEs cpe:/a:redhat:multicluster_engine
Vendors & Products Redhat
Redhat multicluster Engine
References
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-12T19:45:37.611Z

Reserved: 2026-08-11T17:22:38.645Z

Link: CVE-2026-73268

cve-icon Vulnrichment

Updated: 2026-08-12T19:45:35.347Z

cve-icon NVD

Status : Received

Published: 2026-08-12T20:17:53.650

Modified: 2026-08-12T20:17:53.650

Link: CVE-2026-73268

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses