CVE-2026-84716: Red Hat Ansible Automation Platform 2.5 For Rhel 8

Medium severity, CVSS 6.6. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Red Hat Red Hat Ansible Automation Platform 2.5 For Rhel 8: before 0:4.6.33-1.el8ap (fixed in 0:4.6.33-1.el8ap)
• Red Hat Red Hat Ansible Automation Platform 2.5 For Rhel 9: before 0:4.6.33-1.el9ap (fixed in 0:4.6.33-1.el9ap)
• Red Hat Red Hat Ansible Automation Platform 2.6: before 1789673739 (fixed in 1789673739)
• Red Hat Red Hat Ansible Automation Platform 2.6 For Rhel 9: before 0:4.7.17-1.el9ap (fixed in 0:4.7.17-1.el9ap)
• Red Hat Red Hat Ansible Automation Platform 2.7: before 1789580684 (fixed in 1789580684)

Published 2026-09-23. Last modified 2026-09-24.