CVE-2026-84716
Full vulnerability record from the local CVENow database.
Description
A flaw was found in the automation-controller instance install-bundle endpoint. When a System Administrator downloads an execution/hop node's install bundle, the controller signs an X.509 certificate with the receptor mesh certificate authority in which the Common Name, DNS subject-alternative-name, and receptor node-id are taken verbatim from the caller-chosen instance hostname, with a hard-coded ten-year validity, a random serial, and no issuance log or revocation list. Because the hostname charset validator is case-insensitive while the uniqueness validator is case-sensitive, an administrator can register a case variant of an existing control node's hostname and obtain a mesh-CA-signed certificate that TLS peers, which match hostnames case-insensitively, accept as that control node. In managed/hosted deployments — where the customer holds controller superuser but the platform operator runs the mesh — this yields a long-lived, non-revocable mesh peer credential and, with an on-path position, TLS impersonation or interception of control/hybrid mesh nodes. It does not grant direct remote code execution, because receptor work submission is gated by a separate signing key not included in the bundle.
Severity
MEDIUM
CVSS score
6.6
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-09-23 20:17:18.210000
Last modified
2026-11-06 01:17:56.657000
View original CVE JSON
{
"id": "CVE-2026-84716",
"sourceIdentifier": "[email protected]",
"published": "2026-09-23T20:17:18.210",
"lastModified": "2026-11-06T01:17:56.657",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the automation-controller instance\n install-bundle endpoint. When a System Administrator downloads\n an execution/hop node's install bundle, the controller signs an\n X.509 certificate with the receptor mesh certificate authority\n in which the Common Name, DNS subject-alternative-name, and\n receptor node-id are taken verbatim from the caller-chosen\n instance hostname, with a hard-coded ten-year validity, a random\n serial, and no issuance log or revocation list. Because the\n hostname charset validator is case-insensitive while the\n uniqueness validator is case-sensitive, an administrator can\n register a case variant of an existing control node's hostname\n and obtain a mesh-CA-signed certificate that TLS peers, which\n match hostnames case-insensitively, accept as that control node.\n In managed/hosted deployments — where the customer holds\n controller superuser but the platform operator runs the mesh —\n this yields a long-lived, non-revocable mesh peer credential and,\n with an on-path position, TLS impersonation or interception of\n control/hybrid mesh nodes. It does not grant direct remote code\n execution, because receptor work submission is gated by a\n separate signing key not included in the bundle."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Red Hat",
"product": "Red Hat Ansible Automation Platform 2.5 for RHEL 8",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "automation-controller",
"cpes": [
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"cpe:/a:redhat:ansible_automation_platform:2.5::el9",
"cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8",
"cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9",
"cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8",
"cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9"
],
"versions": [
{
"version": "0:4.6.33-1.el8ap",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
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"cpe:/a:redhat:ansible_automation_platform:2.5::el9",
"cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8",
"cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9",
"cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8",
"cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9"
],
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"lessThan": "*",
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}
]
},
{
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"cpe:/a:redhat:ansible_automation_platform:2.5::el9",
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"cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9",
"cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8",
"cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9"
],
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"versionType": "rpm",
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}
]
},
{
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"defaultStatus": "affected",
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"cpe:/a:redhat:ansible_automation_platform:2.5::el9",
"cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8",
"cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9",
"cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8",
"cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9"
],
"versions": [
{
"version": "0:4.6.33-1.el9ap",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
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"defaultStatus": "affected",
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"packageName": "automation-controller",
"cpes": [
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"cpe:/a:redhat:ansible_automation_platform:2.6::el9",
"cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10",
"cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9",
"cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9"
],
"versions": [
{
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"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Ansible Automation Platform 2.6 for RHEL 9",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "automation-controller",
"cpes": [
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"cpe:/a:redhat:ansible_automation_platform:2.6::el9",
"cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10",
"cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9",
"cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9"
],
"versions": [
{
"version": "0:4.7.17-1.el9ap",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Ansible Automation Platform 2.6",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "ansible-automation-platform-26/controller-rhel9",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el9"
],
"versions": [
{
"version": "1789673739",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Ansible Automation Platform 2.7",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "ansible-automation-platform-27/controller-rhel9",
"cpes": [
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],
"versions": [
{
"version": "1789580684",
"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:H/UI:N/S:C/C:H/I:L/A:N",
"baseScore": 6.6,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "HIGH",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 1.3,
"impactScore": 4.7
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-09-24T13:59:02.127273Z",
"id": "CVE-2026-84716",
"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-266"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:71113",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:71114",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:71177",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:71179",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-84716",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2527199",
"source": "[email protected]"
}
]
}