CVE-2026-66795

high Red Hat
CVSS v3 Base Score
9.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: August 17, 2026 (20 days ago)
Last Modified: August 17, 2026
Vendor: Red Hat
Source: REDHAT

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.

CWE

CWE-295

Affected Products

Multicluster Engine for Kubernetes

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov