---
id: CVE-2026-84716
title: |-
  A flaw was found in the automation-controller instance
                    install-bundle endpoint
summary: |-
  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…
severity: medium
cvss: 6.6
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:N'
cwe:
  - CWE-266
vendor: Red Hat
product: automation-controller
affected:
  - automation-controller (all versions)
  - automation-controller (all versions)
  - automation-controller (all versions)
  - ansible-automation-platform-26/controller-rhel9 (all versions)
  - ansible-automation-platform-27/controller-rhel9 (all versions)
patched:
  - ansible_automation_platform_2_5_for_rhel 8
  - ansible_automation_platform_2_5_for_rhel 9
  - ansible_automation_platform_2_6_for_rhel 9
  - ansible_automation_platform 2.6
  - ansible_automation_platform 2.7
published: '2026-09-23'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T16:17:12.540'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84716'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:71113'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:71114'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:71177'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:71179'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-84716'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2527199'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84716.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-84716'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84716'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-24T13:59:02.127273Z'
ingestedAt: '2026-09-23T20:32:10.752Z'
epss: 0.00178
epssPercentile: 0.06517
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:71114** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:71114)
- **RHSA-2026:71113** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.6 for RHEL 9 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:71113)
- **RHSA-2026:71179** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.6 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:71179)
- **RHSA-2026:71177** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.7 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:71177)