CVE-2026-84716

Estado: Pendiente de análisisMedia (6.6)—

Detalles técnicos trazas, registros y código del informe original

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.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:N
Puntuación base: 6.6

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.18%
Percentil entre todas las CVEs puntuadas: 7
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement75 %
Impacto principalT1556 Modify Authentication Processdefense impairment · persistence · credential access70 %
Impacto secundarioT1078.001 Default Accountsstealth · persistence · privilege escalation · initial access60 %
Impacto secundarioT1557 Adversary-in-the-Middlecredential access · collection65 %

AV:N con PR:H permite T1210. Admin puede obtener certificado válido para suplantar nodo de control mediante variante de nombre de host, permitiendo interceptación TLS (T1557) y acceso lateral autenticado (T1078.001, T1556 via CA comprometida).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account Management Password Policies Network Segmentation Multi-factor Authentication Disable or Remove Feature or Program Vulnerability Scanning

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Redhat — Automation Controller^AI

CWE

CWE-266

Referencias

JSON original (NVD)

Mostrar

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  "published": "2026-09-23T20:17:18.210",
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        }
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    {
      "lang": "en",
      "value": "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."
    }
  ],
  "lastModified": "2026-09-24T16:17:12.540",
  "sourceIdentifier": "secalert@redhat.com"
}