FKIE_CVE-2026-27699

Vulnerability from fkie_nvd - Published: 2026-02-25 15:20 - Updated: 2026-06-17 10:27
Severity
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
The `basic-ftp` FTP client library for Node.js contains a path traversal vulnerability (CWE-22) in versions prior to 5.2.0 in the `downloadToDir()` method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory. Version 5.2.0 patches the issue.
References
security-advisories@github.comhttps://github.com/patrickjuchli/basic-ftp/commit/2a2a0e6514357b9eda07c2f8afbd3f04727a7cd9Patch
security-advisories@github.comhttps://github.com/patrickjuchli/basic-ftp/releases/tag/v5.2.0Release Notes
security-advisories@github.comhttps://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-5rq4-664w-9x2cExploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
patrickjuchli basic-ftp *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "basic-ftp",
          "vendor": "patrickjuchli",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.2.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:patrickjuchli:basic-ftp:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "422197F2-36F3-496A-BA4B-09EF41898163",
              "versionEndExcluding": "5.2.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The `basic-ftp` FTP client library for Node.js contains a path traversal vulnerability (CWE-22) in versions prior to 5.2.0 in the `downloadToDir()`\u00a0method. A malicious FTP server can send directory listings with filenames containing path traversal sequences (`../`) that cause files to be written outside the intended download directory. Version 5.2.0 patches the issue."
    },
    {
      "lang": "es",
      "value": "La librer\u00eda cliente FTP `basic-ftp` para Node.js contiene una vulnerabilidad de salto de ruta (CWE-22) en versiones anteriores a la 5.2.0 en el m\u00e9todo `downloadToDir()`. Un servidor FTP malicioso puede enviar listados de directorio con nombres de archivo que contienen secuencias de salto de ruta (`../`) que provocan que los archivos se escriban fuera del directorio de descarga previsto. La versi\u00f3n 5.2.0 corrige el problema."
    }
  ],
  "id": "CVE-2026-27699",
  "lastModified": "2026-06-17T10:27:32.287",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-27699",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-02-27T17:04:25.002414Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-02-25T15:20:53.523",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/patrickjuchli/basic-ftp/commit/2a2a0e6514357b9eda07c2f8afbd3f04727a7cd9"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/patrickjuchli/basic-ftp/releases/tag/v5.2.0"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-5rq4-664w-9x2c"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.