CVE-2026-66780
Full vulnerability record from the local CVENow database.
Description
A flaw was found in the submariner-operator component. The `submariner-k8s-broker-cluster` Role, which is assigned to joined clusters, possesses excessive permissions. This allows a compromised cluster to alter network configurations, specifically by overwriting other clusters' endpoint information. Consequently, an attacker can redirect inter-cluster tunnel traffic, enabling a Man-in-the-Middle (MITM) attack across the entire cluster mesh.
Severity
MEDIUM
CVSS score
6.5
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-08-18 18:19:23.940000
Last modified
2026-10-19 17:17:20.777000
View original CVE JSON
{
"id": "CVE-2026-66780",
"sourceIdentifier": "[email protected]",
"published": "2026-08-18T18:19:23.940",
"lastModified": "2026-10-19T17:17:20.777",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the submariner-operator component. The `submariner-k8s-broker-cluster` Role, which is assigned to joined clusters, possesses excessive permissions. This allows a compromised cluster to alter network configurations, specifically by overwriting other clusters' endpoint information. Consequently, an attacker can redirect inter-cluster tunnel traffic, enabling a Man-in-the-Middle (MITM) attack across the entire cluster mesh."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.11",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/submariner-addon-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.11::el9"
],
"versions": [
{
"version": "1789135606",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.13",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/submariner-addon-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.13::el9"
],
"versions": [
{
"version": "1789131397",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.14",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/submariner-addon-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.14::el9"
],
"versions": [
{
"version": "1789136328",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.15",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/submariner-addon-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.15::el9"
],
"versions": [
{
"version": "1789136327",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.16",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/submariner-addon-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.16::el9"
],
"versions": [
{
"version": "1789136320",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.16",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/submariner-addon-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.16::el9"
],
"versions": [
{
"version": "1787854416",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.16",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/subctl-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.16::el9"
],
"versions": [
{
"version": "1790670243",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.16",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/submariner-rhel9-operator",
"cpes": [
"cpe:/a:redhat:acm:2.16::el9"
],
"versions": [
{
"version": "1790670912",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/subctl-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.17::el9"
],
"versions": [
{
"version": "1788105072",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/submariner-rhel9-operator",
"cpes": [
"cpe:/a:redhat:acm:2.17::el9"
],
"versions": [
{
"version": "1788073481",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.17",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/submariner-addon-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.17::el9"
],
"versions": [
{
"version": "1788572527",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "rhacm2/submariner-operator-bundle",
"cpes": [
"cpe:/a:redhat:acm:2"
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-18T18:44:52.061095Z",
"id": "CVE-2026-66780",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-532"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:63016",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:67538",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:67539",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:67540",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:67541",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:67542",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:67543",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:72880",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85227",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-66780",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507524",
"source": "[email protected]"
}
]
}