CVE-2026-41859

Estado: Pendiente de análisisAlta (7.1)—

A network man-in-the-middle between nats-sync and the BOSH director can steal the director credentials (Basic auth header or UAA client secret) and can tamper with the VM list that is written into the NATS authorization file. Stolen credentials grant administrative director access. UsersSync#bosh_api_response_body builds a Net::HTTP client with verify_mode = OpenSSL::SSL::VERIFY_NONE for every director call (/info, /deployments, /deployments/<name>/vms).

Affected versions: - BOSH: all versions prior to v282.1.9 (inclusive); fixed in v282.1.9 or later

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 7.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.14%
Percentil entre todas las CVEs puntuadas: 3
Fecha de la puntuación: 5/10/2026

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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation60 %
Impacto principalT1557 Adversary-in-the-Middlecredential access · collection55 %

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

User Training Threat Intelligence Program Network Segmentation Network Intrusion Prevention Limit Access to Resource Over Network Filter Network Traffic

Tecnologías afectadas (1)

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

Cloudfoundry — Bosh^AI

CWE

CWE-295

Referencias

https://www.cloudfoundry.org/blog/cve-2026-41859-missing-tls-in-nats-sync/

JSON original (NVD)

Mostrar

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  "id": "CVE-2026-41859",
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  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-41859",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-06-04T12:38:29.282496Z"
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          "modifiedUserInteraction": "NOT_DEFINED",
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          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
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          "modifiedSubIntegrityImpact": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
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      "affectedData": [
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              "versionType": "custom"
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  "published": "2026-06-04T03:16:19.947",
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    {
      "url": "https://www.cloudfoundry.org/blog/cve-2026-41859-missing-tls-in-nats-sync/",
      "source": "security@vmware.com"
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      "description": [
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          "value": "CWE-295"
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    {
      "lang": "en",
      "value": "A network man-in-the-middle between nats-sync and the BOSH director can steal the director credentials (Basic auth header or UAA client secret) and can tamper with the VM list that is written into the NATS authorization file. Stolen credentials grant administrative director access. UsersSync#bosh_api_response_body builds a Net::HTTP client with verify_mode = OpenSSL::SSL::VERIFY_NONE for every director call (/info, /deployments, /deployments/<name>/vms).\n\nAffected versions:\n- BOSH: all versions prior to v282.1.9 (inclusive); fixed in v282.1.9 or later"
    },
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      "lang": "es",
      "value": "Un man-in-the-middle de red entre nats-sync y el director de BOSH puede robar las credenciales del director (encabezado de autenticación básica o secreto de cliente UAA) y puede manipular la lista de VM que se escribe en el archivo de autorización de NATS. Las credenciales robadas otorgan acceso administrativo al director. UsersSync#bosh_api_response_body construye un cliente Net::HTTP con verify_mode = OpenSSL::SSL::VERIFY_NONE para cada llamada al director (/info, /deployments, /deployments/<name>/vms).\n\nVersiones afectadas:\n- BOSH: todas las versiones anteriores a la v282.1.9 (inclusive); corregido en la v282.1.9 o posterior"
    }
  ],
  "lastModified": "2026-07-22T20:10:00.127",
  "sourceIdentifier": "security@vmware.com"
}