---
id: CVE-2026-73267
title: >-
  A flaw was found in the clusterclaims-controller component of multicluster
  engine (MCE)
summary: >-
  A flaw was found in the clusterclaims-controller component of multicluster
  engine (MCE). A tenant with standard permissions to create and delete
  ClusterClaim resources can exploit this by manipulating the `spec.namespace`
  field. This all…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H'
cwe:
  - CWE-602
vendor: Red Hat
product: multicluster-engine/clusterclaims-controller-rhel9
affected:
  - multicluster-engine/clusterclaims-controller-rhel9 (all versions)
  - multicluster-engine/clusterclaims-controller-rhel9 (all versions)
  - multicluster-engine/clusterclaims-controller-rhel9 (all versions)
  - multicluster-engine/clusterclaims-controller-rhel9 (all versions)
  - multicluster-engine/clusterclaims-controller-rhel9 (all versions)
  - multicluster-engine/clusterclaims-controller-rhel9 (all versions)
published: '2026-08-21'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T13:17:22.080'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73267'
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-2026-73267'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2514218'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73267.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-73267'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73267'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-25T15:34:54.106824Z'
epss: 0.00462
epssPercentile: 0.39344
ingestedAt: '2026-09-05T19:43:55.621Z'
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 clusterclaims-controller component of multicluster engine (MCE). A tenant with standard permissions to create and delete ClusterClaim resources can exploit this by manipulating the `spec.namespace` field. This allows the tenant to specify and delete any ManagedCluster, including the hub's local-cluster or other tenants' clusters, due to a missing ownership check. This vulnerability can lead to a denial of service by enabling unauthorized deletion of ManagedClusters.

## 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)