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CVE-2026-4740 Rhacm: open cluster management (ocm): cross-cluster privilege escalation via improper kubernetes client certificate renewal validation

🗓️ 07 Apr 2026 14:30:36Reported by redhatType 
vulnrichment
 vulnrichment
🔗 github.com👁 20 Views

Vulnerability 2026-4740 in Open Cluster Management enables cross-cluster privilege escalation via certificate renewal validation.

Related
Affected
Refs
[
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine:2.10::el9"
    ],
    "vendor": "Red Hat",
    "product": "multicluster engine for Kubernetes 2.1",
    "versions": [
      {
        "status": "unaffected",
        "version": "1776881164",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-engine/registration-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine:2.11::el9"
    ],
    "vendor": "Red Hat",
    "product": "multicluster engine for Kubernetes 2.11",
    "versions": [
      {
        "status": "unaffected",
        "version": "1777478390",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-engine/registration-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine:2.6::el9"
    ],
    "vendor": "Red Hat",
    "product": "multicluster engine for Kubernetes 2.6",
    "versions": [
      {
        "status": "unaffected",
        "version": "1775977180",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-engine/registration-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine:2.8::el9"
    ],
    "vendor": "Red Hat",
    "product": "multicluster engine for Kubernetes 2.8",
    "versions": [
      {
        "status": "unaffected",
        "version": "1775638726",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-engine/registration-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine:2.9::el9"
    ],
    "vendor": "Red Hat",
    "product": "multicluster engine for Kubernetes 2.9",
    "versions": [
      {
        "status": "unaffected",
        "version": "1776445095",
        "lessThan": "*",
        "versionType": "rpm"
      }
    ],
    "packageName": "multicluster-engine/registration-rhel9",
    "collectionURL": "https://catalog.redhat.com/software/containers/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Engine for Kubernetes",
    "packageName": "multicluster-engine/addon-manager-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unknown"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Engine for Kubernetes",
    "packageName": "multicluster-engine/maestro-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unknown"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Engine for Kubernetes",
    "packageName": "multicluster-engine/managedcluster-import-controller-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unknown"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Engine for Kubernetes",
    "packageName": "multicluster-engine/placement-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unknown"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Engine for Kubernetes",
    "packageName": "multicluster-engine/registration-operator-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unknown"
  },
  {
    "cpes": [
      "cpe:/a:redhat:multicluster_engine"
    ],
    "vendor": "Red Hat",
    "product": "Multicluster Engine for Kubernetes",
    "packageName": "multicluster-engine/work-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "unknown"
  }
]

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08 Sep 2026 11:38Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.18.2
EPSS0.00148
SSVC
20