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CVE-2026-23889

Estado: AnalizadaMedia (6.5)—

pnpm is a package manager. Prior to version 10.28.1, a path traversal vulnerability in pnpm's tarball extraction allows malicious packages to write files outside the package directory on Windows. The path normalization only checks for `./` but not `.\`. On Windows, backslashes are directory separators, enabling path traversal. This vulnerability is Windows-only. This issue impacts Windows pnpm users and Windows CI/CD pipelines (GitHub Actions Windows runners, Azure DevOps). It can lead to overwriting `.npmrc`, build configs, or other files. Version 10.28.1 contains a patch.

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)

Pnpm — Pnpm

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-23889",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-23889",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-27T21:40:27.399595Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
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        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
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  },
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      "affectedData": [
        {
          "vendor": "pnpm",
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          "versions": [
            {
              "status": "affected",
              "version": "< 10.28.1"
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  "published": "2026-01-26T22:15:56.213",
  "references": [
    {
      "url": "https://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0",
      "tags": [
        "Patch"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "pnpm is a package manager. Prior to version 10.28.1, a path traversal vulnerability in pnpm's tarball extraction allows malicious packages to write files outside the package directory on Windows. The path normalization only checks for `./` but not `.\\`. On Windows, backslashes are directory separators, enabling path traversal. This vulnerability is Windows-only. This issue impacts Windows pnpm users and Windows CI/CD pipelines (GitHub Actions Windows runners, Azure DevOps). It can lead to overwriting `.npmrc`, build configs, or other files. Version 10.28.1 contains a patch."
    },
    {
      "lang": "es",
      "value": "pnpm es un gestor de paquetes. Antes de la versión 10.28.1, una vulnerabilidad de salto de ruta en la extracción de tarball de pnpm permite a paquetes maliciosos escribir archivos fuera del directorio del paquete en Windows. La normalización de rutas solo verifica `./` pero no `.\\`. En Windows, las barras invertidas son separadores de directorio, lo que permite el salto de ruta. Esta vulnerabilidad es solo para Windows. Este problema afecta a usuarios de pnpm en Windows y a las pipelines de CI/CD en Windows (ejecutores de GitHub Actions en Windows, Azure DevOps). Puede llevar a la sobrescritura de .npmrc, configuraciones de compilación u otros archivos. La versión 10.28.1 contiene un parche."
    }
  ],
  "lastModified": "2026-06-17T10:22:15.820",
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    {
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          "negate": false,
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              "versionEndExcluding": "10.28.1"
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}