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.
History

Fri, 25 Sep 2026 05:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 24 Sep 2026 06:45:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:ansible_automation_platform:2 cpe:/a:redhat:ansible_automation_platform:2.7::el9
References

Thu, 24 Sep 2026 04:00:00 +0000

Type Values Removed Values Added
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
References

Thu, 24 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 23 Sep 2026 22:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat ansible Automation Platform Developer
Redhat ansible Automation Platform Inside
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
Vendors & Products Redhat ansible Automation Platform Developer
Redhat ansible Automation Platform Inside
References

Wed, 23 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
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.
Title Automation-controller: automation-controller: instance install_bundle issues 10-year, non-revocable receptor mesh-ca certificates for caller-chosen (and case-variant impersonating) hostnames
First Time appeared Redhat
Redhat ansible Automation Platform
Weaknesses CWE-266
CPEs cpe:/a:redhat:ansible_automation_platform:2
Vendors & Products Redhat
Redhat ansible Automation Platform
References
Metrics cvssV3_1

{'score': 6.6, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-09-23T19:40:28.390Z

Updated: 2026-10-16T11:55:20.071Z

Reserved: 2026-09-02T01:03:53.834Z

Link: CVE-2026-84716

cve-icon Vulnrichment

Updated: 2026-09-24T13:59:02.992Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-23T20:17:18.210

Modified: 2026-09-24T16:17:12.540

Link: CVE-2026-84716

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-23T00:00:00Z

Links: CVE-2026-84716 - Bugzilla