{"id":"CVE-2026-84716","title":"A flaw was found in the automation-controller instance\n                  install-bundle endpoint","summary":"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…","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)","ansible-automation-platform-26/controller-rhel9 (all versions)","ansible-automation-platform-27/controller-rhel9 (all versions)"],"published":"2026-09-23","updated":"2026-09-23","sourceUpdated":"2026-09-23T23:18:47.887","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/security/cve/CVE-2026-84716","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2527199","label":"secalert@redhat.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-23T20:32:10.752Z","slug":"CVE-2026-84716","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":36.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}