CVE-2026-4740
8.2 · HIGHOverview
CVE-2026-4740 is a high-severity vulnerability affecting redhat advanced_cluster_management_for_kubernetes. It was published on April 7, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
A flaw was found in Open Cluster Management (OCM), the technology underlying Red Hat Advanced Cluster Management (ACM). Improper validation of Kubernetes client certificate renewal allows a managed cluster administrator to forge a client certificate that can be approved by the OCM controller. This enables cross-cluster privilege escalation and may allow an attacker to gain control over other managed clusters, including the hub cluster.
Remediation
Check the references section for vendor advisories and patches from redhat. Update advanced_cluster_management_for_kubernetes to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
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References
Frequently Asked Questions
What is CVE-2026-4740?
CVE-2026-4740 is a high-severity vulnerability affecting redhat advanced_cluster_management_for_kubernetes. It was published on April 7, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).
How severe is CVE-2026-4740?
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-4740?
Check the references section for vendor advisories and patches from redhat. Update advanced_cluster_management_for_kubernetes to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-4740?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-4740 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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