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CVE-2026-55700

Estado: AnalizadaAlta (7.1)—

pnpm is a package manager. From 11.3.0 until 11.5.3, `pnpm stage download` derived a local filename from registry-controlled package name and version fields. A crafted manifest could escape the selected download directory and overwrite another reachable file. The merged fix validates both fields, derives one safe filename, and verifies the final destination before writing. This vulnerability is fixed in 11.5.3.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

UI:R (interacción del usuario) y AV:N dictan T1203. La vulnerabilidad permite sobrescribir archivos mediante un manifiesto manipulado (CWE-22: path traversal), afectando integridad (I:H). También potencia lectura de datos del disco local.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Restrict File and Directory PermissionsRemote Data StorageEncrypt Sensitive InformationApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (1)

Pnpm — Pnpm

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-55700",
  "cveTags": [],
  "metrics": {
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          "options": [
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              "exploitation": "none"
            },
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          "version": "2.0.3",
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          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4.2,
        "exploitabilityScore": 2.8
      }
    ]
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  "affected": [
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      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "pnpm",
          "product": "pnpm",
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              "version": ">= 11.3.0, < 11.5.3"
            }
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  ],
  "published": "2026-06-25T18:16:41.087",
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      "tags": [
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    },
    {
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        "Vendor Advisory"
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      "lang": "en",
      "value": "pnpm is a package manager. From 11.3.0 until 11.5.3, `pnpm stage download` derived a local filename from registry-controlled package name and version fields. A crafted manifest could escape the selected download directory and overwrite another reachable file. The merged fix validates both fields, derives one safe filename, and verifies the final destination before writing. This vulnerability is fixed in 11.5.3."
    }
  ],
  "lastModified": "2026-06-29T21:16:55.820",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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