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Change History

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.

AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CWE-295

https://access.redhat.com/security/cve/CVE-2026-66795

https://bugzilla.redhat.com/show_bug.cgi?id=2507540

[{"vendor":"Red Hat","product":"Multicluster Engine for Kubernetes","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"multicluster-engine/managedcluster-import-controller-rhel9","cpes":["cpe:/a:redhat:multicluster_engine"]}]