Automation-controller: automation-controller: instance install_bundle issues 10-year, non-revocable receptor mesh-ca certificates for caller-chosen (and case-variant impersonating) hostnames
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.
CVE-2026-84716
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-84716
Red Hat Ansible Automation Platform 2.5 for RHEL 8
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Red Hat Ansible Automation Platform 2.5 for RHEL 9
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Red Hat Ansible Automation Platform 2.6 for RHEL 9
Source reference: /containers/cna/affected/2/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Red Hat Ansible Automation Platform 2.6
Source reference: /containers/cna/affected/3/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Red Hat Ansible Automation Platform 2.7
Source reference: /containers/cna/affected/4/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.5::el8",
"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"
],
"vendor": "Red Hat",
"product": "Red Hat Ansible Automation Platform 2.5 for RHEL 8",
"versions": [
{
"status": "unaffected",
"version": "0:4.6.33-1.el8ap",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "automation-controller",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.5::el8",
"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"
],
"vendor": "Red Hat",
"product": "Red Hat Ansible Automation Platform 2.5 for RHEL 9",
"versions": [
{
"status": "unaffected",
"version": "0:4.6.33-1.el9ap",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "automation-controller",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el10",
"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"
],
"vendor": "Red Hat",
"product": "Red Hat Ansible Automation Platform 2.6 for RHEL 9",
"versions": [
{
"status": "unaffected",
"version": "0:4.7.17-1.el9ap",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "automation-controller",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el9"
],
"vendor": "Red Hat",
"product": "Red Hat Ansible Automation Platform 2.6",
"versions": [
{
"status": "unaffected",
"version": "1789673739",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "ansible-automation-platform-26/controller-rhel9",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.7::el9"
],
"vendor": "Red Hat",
"product": "Red Hat Ansible Automation Platform 2.7",
"versions": [
{
"status": "unaffected",
"version": "1789580684",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "ansible-automation-platform-27/controller-rhel9",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-84716
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #32390 · Revision 1
- Added to Heist Feed
- Publisher date