CRITICALVulnerability
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NVD CRITICAL: CVE-2026-66795 — A flaw was found in the managedcluster-import-controller. The Certificate Signin...

·Source: NIST NVD

Updated:

Executive 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, enab

Analysis

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. CVSS Score: 9.1. Published: 2026-08-17T21:16:47.163.

Indicators of Compromise (1)

CVE (1)
CVE-2026-66795
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Aug 17, 2026. Verified by: NIST.

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