---
id: CVE-2026-73268
title: >-
  A flaw was found in the cluster-curator-controller component of multicluster
  engine (MCE)
summary: >-
  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 Cre…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-94
vendor: Red Hat
product: multicluster-engine/cluster-curator-controller-rhel9
affected:
  - multicluster-engine/cluster-curator-controller-rhel9 (all versions)
  - multicluster-engine/cluster-curator-controller-rhel9 (all versions)
  - multicluster-engine/cluster-curator-controller-rhel9 (all versions)
  - multicluster-engine/cluster-curator-controller-rhel9 (all versions)
  - multicluster-engine/cluster-curator-controller-rhel9 (all versions)
  - multicluster-engine/cluster-curator-controller-rhel9 (all versions)
published: '2026-08-12'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T13:17:22.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73268'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:59556'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:59557'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:59558'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:59559'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:59579'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:59593'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-73268'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2514219'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73268.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-73268'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73268'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-08-12T19:45:32.285133Z'
epss: 0.00875
epssPercentile: 0.57196
ingestedAt: '2026-09-05T15:41:16.970Z'
patched:
  - multicluster_engine_for_kubernetes 2.11
  - multicluster_engine_for_kubernetes 2.17
  - multicluster_engine_for_kubernetes 2.1
  - multicluster_engine_for_kubernetes 2.6
  - multicluster_engine_for_kubernetes 2.8
  - multicluster_engine_for_kubernetes 2.9
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:59556** · Red Hat · fixed in: multicluster engine for Kubernetes 2.11 · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:59556)
- **RHSA-2026:59593** · Red Hat · fixed in: multicluster engine for Kubernetes 2.17 · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:59593)
- **RHSA-2026:59557** · Red Hat · fixed in: multicluster engine for Kubernetes 2.1 · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:59557)
- **RHSA-2026:59579** · Red Hat · fixed in: multicluster engine for Kubernetes 2.6 · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:59579)
- **RHSA-2026:59558** · Red Hat · fixed in: multicluster engine for Kubernetes 2.8 · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:59558)
- **RHSA-2026:59559** · Red Hat · fixed in: multicluster engine for Kubernetes 2.9 · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:59559)