CVE-2026-71243

{
  "id": "CVE-2026-71243",
  "sourceIdentifier": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
  "published": "2026-08-05T11:16:27.247",
  "lastModified": "2026-10-24T15:10:00.190",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The backmeup npm package assembles shell command strings by directly concatenating its option values (name, source, destination, filter) - e.g. cmd = \"mkdir -p \" + path.join(info.destination, info.name) + \"; \" - and executes the resulting string through a shell via ssh2-exec (locally via child_process, or remotely via SSH when an ssh handle is supplied), rather than using execFile/spawn with an argument array."
    },
    {
      "lang": "es",
      "value": "El paquete npm backmeup ensambla cadenas de comandos de shell concatenando directamente sus valores de opción (name, source, destination, filter) - p. ej. cmd = ’mkdir -p ’ + path.join(info.destination, info.name) + ’; ’ - y ejecuta la cadena resultante a través de un shell mediante ssh2-exec (localmente mediante child_process, o remotamente mediante SSH cuando se proporciona un manejador ssh), en lugar de usar execFile/spawn con un array de argumentos. El único procesamiento aplicado es path.normalize()/path.join(), que no neutralizan los metacaracteres de shell (;, |,  y , $(), backticks, salto de línea). Cualquier aplicación que pase valores influenciados por el atacante a estas opciones (p. ej. un nombre de copia de seguridad elegido por el usuario) es vulnerable a la ejecución arbitraria de comandos del sistema operativo en el host de copia de seguridad, o en el objetivo SSH remoto cuando uno está configurado."
    }
  ],
  "affected": [
    {
      "source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
      "affectedData": [
        {
          "vendor": "adaltas",
          "product": "backmeup",
          "defaultStatus": "unknown",
          "programFiles": [
            "src/index.coffee.md"
          ],
          "versions": [
            {
              "version": "0",
              "lessThanOrEqual": "0.0.2",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-05T12:50:47.755055Z",
          "id": "CVE-2026-71243",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/adaltas/node-backmeup",
      "source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"
    }
  ]
}