FKIE_CVE-2026-23889

Vulnerability from fkie_nvd - Published: 2026-01-26 22:15 - Updated: 2026-01-28 17:33
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Summary
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.
References
security-advisories@github.comhttps://github.com/pnpm/pnpm/commit/6ca07ffbe6fc0e8b8cdc968f228903ba0886f7c0Patch
security-advisories@github.comhttps://github.com/pnpm/pnpm/releases/tag/v10.28.1Patch
security-advisories@github.comhttps://github.com/pnpm/pnpm/security/advisories/GHSA-6x96-7vc8-cm3pExploit, Vendor Advisory
Impacted products
Vendor Product Version
pnpm pnpm *
microsoft windows -
To clipboard 

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              "criteria": "cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:*",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "pnpm is a package manager. Prior to version 10.28.1, a path traversal vulnerability in pnpm\u0027s 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."
    }
  ],
  "id": "CVE-2026-23889",
  "lastModified": "2026-01-28T17:33:40.743",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
          "version": "3.1"
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        "impactScore": 3.6,
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        "type": "Secondary"
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  "published": "2026-01-26T22:15:56.213",
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  "vulnStatus": "Analyzed",
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          "value": "CWE-22"
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      "source": "security-advisories@github.com",
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}


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