BREW-PNPM-CVE-2026-55699 (GHSA-4GXM-V5V7-FQC4)

Vulnerability from osv_homebrew – Published: 2026-08-13 17:28 – Updated: 2026-09-24 10:51 – Source website
VLAI
Summary
pnpm: reserved bin name deletes PNPM_HOME during global remove
Details

pnpm is a package manager. Prior to 10.34.2 and 11.5.3, Manifest bin object keys such as "", ".", and ".." passed pnpm's bin-name guard. When a malicious package was installed globally, later global remove, update, or add-replacement flows could re-derive those names from the installed manifest and pass path.join(globalBinDir, binName) to removeBin. For "." this targets the global bin directory; for ".." this targets its parent. This vulnerability is fixed in 10.34.2 and 11.5.3.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "11.5.3"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "pnpm",
        "purl": "pkg:brew/pnpm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "11.21.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "git",
    "upstream_evidence": [
      {
        "ecosystem": "GIT",
        "key": "https://github.com/pnpm/pnpm",
        "name": "https://github.com/pnpm/pnpm",
        "strategy": "git",
        "subject_version": "v12.6.0"
      },
      {
        "ecosystem": "npm",
        "key": "pkg:npm/pnpm@12.6.0",
        "name": "pnpm",
        "strategy": "registry",
        "subject_version": "12.6.0"
      }
    ]
  },
  "details": "pnpm is a package manager. Prior to 10.34.2 and 11.5.3, Manifest bin object keys such as \"\", \".\", and \"..\" passed pnpm\u0027s bin-name guard. When a malicious package was installed globally, later global remove, update, or add-replacement flows could re-derive those names from the installed manifest and pass path.join(globalBinDir, binName) to removeBin. For \".\" this targets the global bin directory; for \"..\" this targets its parent. This vulnerability is fixed in 10.34.2 and 11.5.3.",
  "id": "BREW-pnpm-CVE-2026-55699",
  "modified": "2026-09-24T10:51:13Z",
  "published": "2026-08-13T17:28:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55699.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/pnpm/pnpm/security/advisories/GHSA-4gxm-v5v7-fqc4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55699"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "pnpm: reserved bin name deletes PNPM_HOME during global remove",
  "upstream": [
    "GHSA-4gxm-v5v7-fqc4",
    "CVE-2026-55699"
  ]
}



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