{"schema_version":"1","data":[{"id":3982,"advisory_id":"fb515509-26c2-4791-ab95-4d7188b13bca","revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-66795","source_published_at":"2026-08-17T20:45:33.786+00:00","published_at":"2026-10-24T21:44:36.894027+00:00","extraction_method":"structured","technologies":["core-cve","multicluster-engine-for-kubernetes-2-10","multicluster-engine-for-kubernetes-2-11","multicluster-engine-for-kubernetes-2-17","multicluster-engine-for-kubernetes-2-6","multicluster-engine-for-kubernetes-2-8","multicluster-engine-for-kubernetes-2-9"],"cve_ids":["CVE-2026-66795"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Managedcluster-import-controller: csr auto-approver does not validate certificate subject or signername (spoke→hub cluster-admin)","summary":"A flaw was found in the managedcluster-import-controller. The Certificate Signing Request (CSR) auto-approval logic improperly validates incoming CSRs, specifically by not inspecting the signer name or decoding the PEM-encoded x509 CSR. This vulnerability allows a privileged service account on a spoke cluster to submit a malicious CSR. Successful exploitation can lead to privilege escalation, enabling the attacker to obtain administrative credentials on the hub cluster.","evidence":"cve:CVE-2026-66795","products":[{"name":{"value":"multicluster engine for Kubernetes 2.10","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]},{"name":{"value":"multicluster engine for Kubernetes 2.11","evidence":"/containers/cna/affected/1/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]},{"name":{"value":"multicluster engine for Kubernetes 2.17","evidence":"/containers/cna/affected/2/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]},{"name":{"value":"multicluster engine for Kubernetes 2.6","evidence":"/containers/cna/affected/3/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]},{"name":{"value":"multicluster engine for Kubernetes 2.8","evidence":"/containers/cna/affected/4/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]},{"name":{"value":"multicluster engine for Kubernetes 2.9","evidence":"/containers/cna/affected/5/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"critical","structured":{"id":"CVE-2026-66795","aliases":["CVE-2026-66795"],"metrics":[{"other":{"type":"Red Hat severity rating","content":{"value":"Important","namespace":"https://access.redhat.com/security/updates/classification/"}}},{"format":"CVSS","cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":9.9,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}}],"affected":[{"cpes":["cpe:/a:redhat:multicluster_engine:2.10::el9"],"vendor":"Red Hat","product":"multicluster engine for Kubernetes 2.10","versions":[{"status":"unaffected","version":"1787078272","lessThan":"*","versionType":"rpm"}],"packageName":"multicluster-engine/managedcluster-import-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":"1787078330","lessThan":"*","versionType":"rpm"}],"packageName":"multicluster-engine/managedcluster-import-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":"1786577915","lessThan":"*","versionType":"rpm"}],"packageName":"multicluster-engine/managedcluster-import-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":"1787260779","lessThan":"*","versionType":"rpm"}],"packageName":"multicluster-engine/managedcluster-import-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":"1787259044","lessThan":"*","versionType":"rpm"}],"packageName":"multicluster-engine/managedcluster-import-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":"1787078307","lessThan":"*","versionType":"rpm"}],"packageName":"multicluster-engine/managedcluster-import-controller-rhel9","collectionURL":"https://catalog.redhat.com/software/containers/","defaultStatus":"affected"}],"modified":"2026-09-29T19:41:20.174Z","provider":"cve","references":["https://access.redhat.com/errata/RHSA-2026:59556","https://access.redhat.com/errata/RHSA-2026:59557","https://access.redhat.com/errata/RHSA-2026:59558","https://access.redhat.com/errata/RHSA-2026:59559","https://access.redhat.com/errata/RHSA-2026:59579","https://access.redhat.com/errata/RHSA-2026:59593","https://access.redhat.com/security/cve/CVE-2026-66795","https://bugzilla.redhat.com/show_bug.cgi?id=2507540"],"provider_metadata":{"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-66795","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-08-18T15:15:25.705433Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-18T15:15:40.084Z"}}],"cna":{"orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat","dateUpdated":"2026-09-29T19:41:20.174Z"}}},"related_cves":[{"value":"CVE-2026-66795","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":"/containers/cna/metrics"}}],"next_after":3982,"next_before":3982}