CVE-2026-73267
Full vulnerability record from the local CVENow database.
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.
Severity
HIGH
CVSS score
7.7
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-08-21 03:16:39.080000
Last modified
2026-10-26 10:10:00.140000
View original CVE JSON
{
"id": "CVE-2026-73267",
"sourceIdentifier": "[email protected]",
"published": "2026-08-21T03:16:39.080",
"lastModified": "2026-10-26T10:10:00.140",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "Se encontró una falla en el componente clusterclaims-controller de multicluster engine (MCE). Un inquilino con permisos estándar para crear y eliminar recursos ClusterClaim puede explotar esto manipulando el campo ’spec.namespace’. Esto permite al inquilino especificar y eliminar cualquier ManagedCluster, incluyendo el local-cluster del hub u otros clústeres de inquilinos, debido a una falta de verificación de propiedad. Esta vulnerabilidad puede llevar a una denegación de servicio al permitir la eliminación no autorizada de ManagedClusters."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.10",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-engine/clusterclaims-controller-rhel9",
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.10::el9"
],
"versions": [
{
"version": "1787196014",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.11",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-engine/clusterclaims-controller-rhel9",
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.11::el9"
],
"versions": [
{
"version": "1787239442",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.17",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-engine/clusterclaims-controller-rhel9",
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.17::el9"
],
"versions": [
{
"version": "1786577950",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.6",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-engine/clusterclaims-controller-rhel9",
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.6::el9"
],
"versions": [
{
"version": "1787259112",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.8",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-engine/clusterclaims-controller-rhel9",
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.8::el9"
],
"versions": [
{
"version": "1787259059",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "multicluster engine for Kubernetes 2.9",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-engine/clusterclaims-controller-rhel9",
"cpes": [
"cpe:/a:redhat:multicluster_engine:2.9::el9"
],
"versions": [
{
"version": "1787195995",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 3.1,
"impactScore": 4.0
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-25T15:34:54.106824Z",
"id": "CVE-2026-73267",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-602"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:59556",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:59557",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:59558",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:59559",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:59579",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:59593",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-73267",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2514218",
"source": "[email protected]"
}
]
}