{"id":"CVE-2026-84716","published":"2026-09-23T20:17:18.210","lastModified":"2026-09-24T16:17:12.540","description":"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.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.","cvssScore":6.6,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:N","cwes":["CWE-266"],"vendors":[],"products":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:71113","tags":[]},{"url":"https://access.redhat.com/errata/RHSA-2026:71114","tags":[]},{"url":"https://access.redhat.com/errata/RHSA-2026:71177","tags":[]},{"url":"https://access.redhat.com/errata/RHSA-2026:71179","tags":[]},{"url":"https://access.redhat.com/security/cve/CVE-2026-84716","tags":[]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2527199","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}