FKIE_CVE-2026-21715

Vulnerability from fkie_nvd - Published: 2026-03-30 20:16 - Updated: 2026-04-01 16:23
Severity ?
3.3 (Low) - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Summary
A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync.native()` without the required read permission checks, while all comparable filesystem functions correctly enforce them. As a result, code running under `--permission` with restricted `--allow-fs-read` can still use `fs.realpathSync.native()` to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories. This vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-read` is intentionally restricted.
References
support@hackerone.comhttps://nodejs.org/en/blog/vulnerability/march-2026-security-releases
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync.native()` without the required read permission checks, while all comparable filesystem functions correctly enforce them.\r\n\r\nAs a result, code running under `--permission` with restricted `--allow-fs-read` can still use `fs.realpathSync.native()` to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories.\r\n\r\nThis vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-read` is intentionally restricted."
    },
    {
      "lang": "es",
      "value": "Una falla en la aplicaci\u00f3n del modelo de permisos del sistema de archivos de Node.js deja a \u0027fs.realpathSync.native()\u0027 sin las comprobaciones de permisos de lectura requeridas, mientras que todas las funciones comparables del sistema de archivos las aplican correctamente.\n\nComo resultado, el c\u00f3digo que se ejecuta bajo \u0027--permission\u0027 con \u0027--allow-fs-read\u0027 restringido a\u00fan puede usar \u0027fs.realpathSync.native()\u0027 para verificar la existencia de archivos, resolver destinos de enlaces simb\u00f3licos y enumerar rutas del sistema de archivos fuera de los directorios permitidos.\n\nEsta vulnerabilidad afecta a los procesos 20.x, 22.x, 24.x y 25.x que utilizan el Modelo de Permisos donde \u0027--allow-fs-read\u0027 est\u00e1 restringido intencionalmente."
    }
  ],
  "id": "CVE-2026-21715",
  "lastModified": "2026-04-01T16:23:48.967",
  "metrics": {
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 3.3,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4,
        "source": "support@hackerone.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-30T20:16:19.703",
  "references": [
    {
      "source": "support@hackerone.com",
      "url": "https://nodejs.org/en/blog/vulnerability/march-2026-security-releases"
    }
  ],
  "sourceIdentifier": "support@hackerone.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-732"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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