by Kastro CVE-2026-66795
Red Hat multicluster engine for Kubernetes 2.10 — Managedcluster-import-controller: csr auto-approver does not validate certificate subject or signername (spoke→hub cluster-admin)
Description · from the CVE record
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.
Affected
ProductAffectedFixed inSource
multicluster engine for Kubernetes 2.10see advisory1787078272CNA
multicluster engine for Kubernetes 2.11see advisory1787078330CNA
multicluster engine for Kubernetes 2.17see advisory1786577915CNA
multicluster engine for Kubernetes 2.6see advisory1787260779CNA
multicluster engine for Kubernetes 2.8see advisory1787259044CNA
multicluster engine for Kubernetes 2.9see advisory1787078307CNA
Scores by source
redhat (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total