Vulnerability intelligence

CVE-2026-66795

Red Hat multicluster engine for Kubernetes 2.10 CWE-295

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

Critical

EPSS — Exploit Probability

0.5%

Riskier than 40% of all CVEs · checked 2026-09-30

Exploitation

Not in CISA KEV

KEV does not include every exploited vulnerability

Remediation

unknown

Check vendor advisories