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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | multicluster engine for Kubernetes 2.10 | — | — |
| Red Hat | multicluster engine for Kubernetes 2.11 | — | — |
| Red Hat | multicluster engine for Kubernetes 2.17 | — | — |
| Red Hat | multicluster engine for Kubernetes 2.6 | — | — |
| Red Hat | multicluster engine for Kubernetes 2.8 | — | — |
| Red Hat | multicluster engine for Kubernetes 2.9 | — | — |
References
- RHSA-2026:59556 vendor-advisory
- RHSA-2026:59557 vendor-advisory
- RHSA-2026:59558 vendor-advisory
- RHSA-2026:59559 vendor-advisory
- RHSA-2026:59579 vendor-advisory
- RHSA-2026:59593 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-73268 vdb-entry
- RHBZ#2514219 issue-tracking