Clusterclaims-controller: managedcluster deletion keyed solely on clusterclaim.spec.namespace with no local ownership check
Summary
| CVE | CVE-2026-73267 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-21 03:16:39 UTC |
| Updated | 2026-09-05 15:17:30 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 7.7 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS: 0.004620000 probability, percentile 0.384230000 (date 2026-09-05)
Problem Types: CWE-602 | CWE-602 Client-Side Enforcement of Server-Side Security
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.7 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 7.7 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
ChangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Hat | Multicluster Engine For Kubernetes 2.1 | unaffected 1787196014 * rpm | Not specified |
| CNA | Red Hat | Multicluster Engine For Kubernetes 2.11 | unaffected 1787239442 * rpm | Not specified |
| CNA | Red Hat | Multicluster Engine For Kubernetes 2.17 | unaffected 1786577950 * rpm | Not specified |
| CNA | Red Hat | Multicluster Engine For Kubernetes 2.6 | unaffected 1787259112 * rpm | Not specified |
| CNA | Red Hat | Multicluster Engine For Kubernetes 2.8 | unaffected 1787259059 * rpm | Not specified |
| CNA | Red Hat | Multicluster Engine For Kubernetes 2.9 | unaffected 1787195995 * rpm | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2026:59593 | [email protected] | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | [email protected] | bugzilla.redhat.com | |
| access.redhat.com/security/cve/CVE-2026-73267 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:59556 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:59557 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:59579 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:59558 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:59559 | [email protected] | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-08-10T00:00:00.000Z | Reported to Red Hat. |
| CNA | 2026-08-11T00:00:00.000Z | Made public. |
Workarounds
CNA: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
There are currently no legacy QID mappings associated with this CVE.