CVE-2026-66781
Full vulnerability record from the local CVENow database.
Description
A flaw was found in the Submariner operator. The Submariner Custom Resource (CR), used for configuring network connectivity, stores the IPsec pre-shared key (PSK) in an unencrypted format. This key, which is critical for securing communication between Kubernetes clusters, can be accessed by unauthorized parties. Such access enables an attacker to passively decrypt network traffic flowing between any two clusters in the mesh, resulting in sensitive information disclosure.
Severity
MEDIUM
CVSS score
5.4
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-08-18 17:17:00.580000
Last modified
2026-10-19 17:17:20.993000
View original CVE JSON
{
"id": "CVE-2026-66781",
"sourceIdentifier": "[email protected]",
"published": "2026-08-18T17:17:00.580",
"lastModified": "2026-10-19T17:17:20.993",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the Submariner operator. The Submariner Custom Resource (CR), used for configuring network connectivity, stores the IPsec pre-shared key (PSK) in an unencrypted format. This key, which is critical for securing communication between Kubernetes clusters, can be accessed by unauthorized parties. Such access enables an attacker to passively decrypt network traffic flowing between any two clusters in the mesh, resulting in sensitive information disclosure."
}
],
"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": "1787689013",
"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": "1787365971",
"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": "1787362756",
"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": "1787362733",
"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": "1787362694",
"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/submariner-addon-rhel9",
"cpes": [
"cpe:/a:redhat:acm:2.17::el9"
],
"versions": [
{
"version": "1787362658",
"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",
"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:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"attackVector": "ADJACENT_NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"availabilityImpact": "LOW"
},
"exploitabilityScore": 2.8,
"impactScore": 2.5
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-18T19:21:35.955137Z",
"id": "CVE-2026-66781",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-749"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:60386",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60387",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60388",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60389",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60390",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:60391",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:63016",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85227",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-66781",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507526",
"source": "[email protected]"
}
]
}