CVE-2026-66785
Full vulnerability record from the local CVENow database.
Description
A flaw was found in Submariner. This vulnerability allows a malicious cluster (spoke) to redirect network traffic from other connected clusters (peer clusters) by publishing a specially crafted network endpoint. The system fails to properly validate the network subnets provided by the malicious cluster, enabling it to declare arbitrary network ranges. Consequently, all network traffic intended for these arbitrary ranges from peer clusters will be rerouted through the attacker's tunnel, potentially leading to unauthorized information disclosure or network disruption.
Severity
HIGH
CVSS score
8.7
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-08-20 19:16:58.463000
Last modified
2026-10-19 18:17:08.157000
View original CVE JSON
{
"id": "CVE-2026-66785",
"sourceIdentifier": "[email protected]",
"published": "2026-08-20T19:16:58.463",
"lastModified": "2026-10-19T18:17:08.157",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in Submariner. This vulnerability allows a malicious cluster (spoke) to redirect network traffic from other connected clusters (peer clusters) by publishing a specially crafted network endpoint. The system fails to properly validate the network subnets provided by the malicious cluster, enabling it to declare arbitrary network ranges. Consequently, all network traffic intended for these arbitrary ranges from peer clusters will be rerouted through the attacker's tunnel, potentially leading to unauthorized information disclosure or network disruption."
},
{
"lang": "es",
"value": "Se encontró un fallo en Submariner. Esta vulnerabilidad permite a un clúster malicioso (spoke) redirigir el tráfico de red de otros clústeres conectados (clústeres pares) al publicar un punto final de red especialmente diseñado. El sistema no valida correctamente las subredes de red proporcionadas por el clúster malicioso, lo que le permite declarar rangos de red arbitrarios. En consecuencia, todo el tráfico de red destinado a estos rangos arbitrarios desde los clústeres pares será redirigido a través del túnel del atacante, lo que podría llevar a una revelación de información no autorizada o a una interrupción de la red."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Red Hat",
"product": "Red Hat Advanced Cluster Management for Kubernetes 2.16",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "rhacm2/lighthouse-agent-rhel9",
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],
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{
"version": "1790670439",
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}
]
},
{
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{
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{
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},
{
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]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "HIGH",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 2.3,
"impactScore": 5.8
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-25T15:16:29.726764Z",
"id": "CVE-2026-66785",
"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-345"
}
]
}
],
"references": [
{
"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-2026-66785",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507530",
"source": "[email protected]"
}
]
}