CVE-2026-49982

{
  "id": "CVE-2026-49982",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-11T17:16:35.227",
  "lastModified": "2026-10-26T11:10:00.157",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "tmp is a temporary file and directory creator for node.js. In version 0.2.6, the _assertPath guard added to tmp rejects only string values that contain the substring ... It is bypassed when prefix, postfix, or template is supplied as a non-string value (Array, Buffer, or any object) whose includes('..') returns falsy but whose stringification still contains ../. The value flows through Array.prototype.join/String coercion inside _generateTmpName and path.join(tmpDir, opts.dir, name), producing a final path that escapes tmpdir and creates a file or directory at an attacker-controlled location with the host process's privileges. This affects any application that forwards untrusted request data (a common pattern is JSON body fields or qs-parsed bracket-array query strings such as ?prefix[]=...) into tmp.file, tmp.fileSync, tmp.dir, tmp.dirSync, tmp.tmpName, or tmp.tmpNameSync without explicit type coercion. This vulnerability is fixed in 0.2.7."
    },
    {
      "lang": "es",
      "value": "tmp es un creador de archivos y directorios temporales para node.js. En la versión 0.2.6, la protección _assertPath añadida a tmp rechaza solo valores de cadena que contienen la subcadena ... Se omite cuando prefix, postfix o template se suministra como un valor no-cadena (Array, Buffer o cualquier objeto) cuyo includes(’..’) devuelve falso pero cuya conversión a cadena aún contiene .. / . El valor fluye a través de la coerción Array.prototype.join/String dentro de _generateTmpName y path.join(tmpDir, opts.dir, name), produciendo una ruta final que escapa de tmpdir y crea un archivo o directorio en una ubicación controlada por el atacante con los privilegios del proceso anfitrión. Esto afecta a cualquier aplicación que reenvía datos de solicitud no confiables (un patrón común son los campos de cuerpo JSON o las cadenas de consulta de array entre corchetes analizadas por qs como ?prefix[]=...) a tmp.file, tmp.fileSync, tmp.dir, tmp.dirSync, tmp.tmpName o tmp.tmpNameSync sin coerción de tipo explícita. Esta vulnerabilidad se corrige en 0.2.7."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "raszi",
          "product": "node-tmp",
          "versions": [
            {
              "version": "0.2.6",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-11T18:24:14.195781Z",
          "id": "CVE-2026-49982",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        },
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
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  "references": [
    {
      "url": "https://github.com/raszi/node-tmp/security/advisories/GHSA-7c78-jf6q-g5cm",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
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    },
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
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}