CVE-2026-4740
April 8, 2026, 9:27 p.m.
8.2
High
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.
Product(s) Impacted
| Vendor | Product | Versions |
|---|---|---|
| Red Hat |
|
|
| Kubernetes |
|
|
Weaknesses
Common security weaknesses mapped to this vulnerability.
CWE-295
Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
*CPE(s)
Affected systems and software identified for this CVE.
| Type | Vendor | Product | Version | Update | Edition | Language | Software Edition | Target Software | Target Hardware | Other Information |
|---|---|---|---|---|---|---|---|---|---|---|
| a | red_hat | open_cluster_management | / | / | / | / | / | / | / | / |
| a | red_hat | advanced_cluster_management | / | / | / | / | / | / | / | / |
| a | kubernetes | kubernetes | / | / | / | / | / | / | / | / |
Tags
CVSS Score
CVSS Data - 3.1
- Attack Vector: LOCAL
- Attack Complexity: LOW
- Privileges Required: HIGH
- Scope: CHANGED
- Confidentiality Impact: HIGH
- Integrity Impact: HIGH
- Availability Impact: HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Timeline
Published: April 7, 2026, 3:17 p.m.
Last Modified: April 8, 2026, 9:27 p.m.
Last Modified: April 8, 2026, 9:27 p.m.
Status : Awaiting Analysis
CVE has been recently published to the CVE List and has been received by the NVD.
More infoSource
*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.