CVE WatchSep 8, 2026

CVE-2026-66795

A flaw was found in the managedcluster-import-controller. The Certificate Signing Request (CSR) auto-approval logic improperly validates inc

CVSS

9.9

Critical

EPSS

0.3%

p24

KEV

—

Exploit Today

0-100

Published: Aug 17, 2026 · Last modified: Sep 8, 2026 · CWE-295

EPSS · 30d

0.2%EPSS · 30 days0.4%

2026-08-182026-09-11

Technical description

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.

Official references

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CVECVSSEPSSKEVRExploitTitleMod.

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