CVE-2026-71577
Full vulnerability record from the local CVENow database.
Description
A flaw was found in multicluster-global-hub. During a ManagedClusterMigration, the system incorrectly grants all managed hubs read access to a shared communication topic. This allows a compromised managed hub to intercept and collect sensitive bootstrap kubeconfigs, which contain API server tokens intended for other hubs. These tokens have an extended validity of approximately 9.86 years, significantly increasing the risk of unauthorized access and information disclosure to other managed clusters.
Severity
MEDIUM
CVSS score
6.3
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-08-10 17:17:36.197000
Last modified
2026-10-24 15:10:00.190000
View original CVE JSON
{
"id": "CVE-2026-71577",
"sourceIdentifier": "[email protected]",
"published": "2026-08-10T17:17:36.197",
"lastModified": "2026-10-24T15:10:00.190",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in multicluster-global-hub. During a ManagedClusterMigration, the system incorrectly grants all managed hubs read access to a shared communication topic. This allows a compromised managed hub to intercept and collect sensitive bootstrap kubeconfigs, which contain API server tokens intended for other hubs. These tokens have an extended validity of approximately 9.86 years, significantly increasing the risk of unauthorized access and information disclosure to other managed clusters."
},
{
"lang": "es",
"value": "Se encontró una vulnerabilidad en multicluster-global-hub. Durante una ManagedClusterMigration, el sistema concede incorrectamente a todos los hubs gestionados acceso de lectura a un tema de comunicación compartido. Esto permite a un hub gestionado comprometido interceptar y recopilar kubeconfigs de arranque sensibles, que contienen tokens del servidor API destinados a otros hubs. Estos tokens tienen una validez extendida de aproximadamente 9.86 años, lo que aumenta significativamente el riesgo de acceso no autorizado y revelación de información a otros clusters gestionados."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Red Hat",
"product": "Multicluster Global Hub 1.4.9",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
"cpes": [
"cpe:/a:redhat:multicluster_globalhub:1.4::el9"
],
"versions": [
{
"version": "1788355417",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Multicluster Global Hub 1.5.8",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
"cpes": [
"cpe:/a:redhat:multicluster_globalhub:1.5::el9"
],
"versions": [
{
"version": "1789478830",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Multicluster Global Hub 1.6.6",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
"cpes": [
"cpe:/a:redhat:multicluster_globalhub:1.6::el9"
],
"versions": [
{
"version": "1790085268",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Multicluster Global Hub 1.7.3",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
"cpes": [
"cpe:/a:redhat:multicluster_globalhub:1.7::el9"
],
"versions": [
{
"version": "1788372439",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Multicluster Global Hub 1.8.2",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
"cpes": [
"cpe:/a:redhat:multicluster_globalhub:1.8::el9"
],
"versions": [
{
"version": "1788359461",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Multicluster Global Hub 1.8.2",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "multicluster-globalhub/multicluster-globalhub-rhel9-operator",
"cpes": [
"cpe:/a:redhat:multicluster_globalhub:1.8::el9"
],
"versions": [
{
"version": "1790638386",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 1.8,
"impactScore": 4.0
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-11T01:59:24.928197Z",
"id": "CVE-2026-71577",
"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-522"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:67516",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:67842",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:68515",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:71597",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:73038",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:73419",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-71577",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2512514",
"source": "[email protected]"
}
]
}