CVE-2026-4740

Katalog CVE

CVSS 8.2 · High EPSS 0,16%

Kerentanan Improper Certificate Validation pada redhat advanced cluster management for kubernetes. Skor CVSS 3.1 8.2 (High) menurut redhat.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

7 April 2026

Terakhir diubah

8 September 2026

Status NVD

Modified

CVSS 3.1

8.2 (High), sumber redhat.com
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-295: Improper Certificate Validation

EPSS (30 hari)

0,16% peluang dieksploitasi; lebih tinggi dari 5,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://access.redhat.com/security/cve/CVE-2026-4740 advisory vendor
• https://bugzilla.redhat.com/show_bug.cgi?id=2450590 issue tracking · advisory vendor
• https://blog.arfevrier.fr/open-cluster-management-cross-cluster-escape/ exploit · advisory pihak ketiga
• https://access.redhat.com/errata/RHSA-2026:11414
• https://access.redhat.com/errata/RHSA-2026:13542
• https://access.redhat.com/errata/RHSA-2026:13853
• https://access.redhat.com/errata/RHSA-2026:8218
• https://access.redhat.com/errata/RHSA-2026:9848
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4740.json