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CVE-2019-9804

Estado: ModificadaCrítica (9.8)—

En las Herramientas de Desarrollo (Developer Tools) de Firefox es posible que al pegar el resultado del comando 'Copy as cURL' hacia un shell de comandos en macOS, se provoque la ejecución de comandos de script bash adicionales involuntarios si la URL fue maliciosamente creada. Este es el resultado de un problema con la versión nativa de Bash en macOS. * Nota: Este problema impacta solo a macOS. Otros sistemas operativos están sin impactación. *. Esta vulnerabilidad impacta a Firefox anterior a versión 66.

CVSS

Probabilidad de explotación (EPSS)

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).

Tecnologías afectadas (1)

Mozilla — Firefox

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2019-9804",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 3.9
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  "affected": [
    {
      "source": "security@mozilla.org",
      "affectedData": [
        {
          "vendor": "Mozilla",
          "product": "Firefox",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "66",
              "versionType": "custom"
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  "published": "2019-04-26T17:29:03.430",
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      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1518026",
      "tags": [
        "Issue Tracking"
      ],
      "source": "security@mozilla.org"
    },
    {
      "url": "https://www.mozilla.org/security/advisories/mfsa2019-07/",
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        "Vendor Advisory"
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      "source": "security@mozilla.org"
    },
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1518026",
      "tags": [
        "Issue Tracking"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Firefox Developer Tools it is possible that pasting the result of the 'Copy as cURL' command into a command shell on macOS will cause the execution of unintended additional bash script commands if the URL was maliciously crafted. This is the result of an issue with the native version of Bash on macOS. *Note: This issue only affects macOS. Other operating systems are unaffected.*. This vulnerability affects Firefox < 66."
    },
    {
      "lang": "es",
      "value": "En las Herramientas de Desarrollo (Developer Tools) de Firefox es posible que al pegar el resultado del comando 'Copy as cURL' hacia un shell de comandos en macOS, se provoque la ejecución de comandos de script bash adicionales involuntarios si la URL fue maliciosamente creada. Este es el resultado de un problema con la versión nativa de Bash en macOS. * Nota: Este problema impacta solo a macOS. Otros sistemas operativos están sin impactación. *. Esta vulnerabilidad impacta a Firefox anterior a versión 66."
    }
  ],
  "lastModified": "2026-06-17T02:44:38.077",
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    {
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}