CVE-2026-73266

{"id": "CVE-2026-73266", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-73266", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-18T01:25:32.223923Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secalert@redhat.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.7, "exploitabilityScore": 1.8}]}, "affected": [{"source": "secalert@redhat.com", "affectedData": [{"cpes": ["cpe:/a:redhat:multicluster_engine:2.10::el9"], "vendor": "Red Hat", "product": "multicluster engine for Kubernetes 2.1", "versions": [{"status": "unaffected", "version": "1787196014", "lessThan": "*", "versionType": "rpm"}], "packageName": "multicluster-engine/clusterclaims-controller-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:multicluster_engine:2.11::el9"], "vendor": "Red Hat", "product": "multicluster engine for Kubernetes 2.11", "versions": [{"status": "unaffected", "version": "1787239442", "lessThan": "*", "versionType": "rpm"}], "packageName": "multicluster-engine/clusterclaims-controller-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:multicluster_engine:2.17::el9"], "vendor": "Red Hat", "product": "multicluster engine for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1786577950", "lessThan": "*", "versionType": "rpm"}], "packageName": "multicluster-engine/clusterclaims-controller-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:multicluster_engine:2.6::el9"], "vendor": "Red Hat", "product": "multicluster engine for Kubernetes 2.6", "versions": [{"status": "unaffected", "version": "1787259112", "lessThan": "*", "versionType": "rpm"}], "packageName": "multicluster-engine/clusterclaims-controller-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:multicluster_engine:2.8::el9"], "vendor": "Red Hat", "product": "multicluster engine for Kubernetes 2.8", "versions": [{"status": "unaffected", "version": "1787259059", "lessThan": "*", "versionType": "rpm"}], "packageName": "multicluster-engine/clusterclaims-controller-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:multicluster_engine:2.9::el9"], "vendor": "Red Hat", "product": "multicluster engine for Kubernetes 2.9", "versions": [{"status": "unaffected", "version": "1787195995", "lessThan": "*", "versionType": "rpm"}], "packageName": "multicluster-engine/clusterclaims-controller-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}]}], "published": "2026-08-13T17:17:35.713", "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:59556", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:59557", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:59558", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:59559", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:59579", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:59593", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-73266", "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2514217", "source": "secalert@redhat.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-441"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in the clusterclaims-controller component of Multicluster Engine (MCE). An authenticated tenant can exploit this vulnerability by manipulating ClusterClaim labels. This allows the tenant to force a cluster to join a ManagedClusterSet belonging to another tenant. Such unauthorized access could enable the injection of policies and workloads into other tenants' clusters."}], "lastModified": "2026-09-08T13:17:21.923", "sourceIdentifier": "secalert@redhat.com"}