pnpm 11.0.0 before 11.11.0 Environment Variable Exfiltration via Proxy Settings

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-101043",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-09-27T17:02:33.119Z",
    "dateReserved": "2026-09-27T15:48:49.472Z",
    "datePublished": "2026-09-27T17:02:33.119Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-09-27T17:02:33.119Z"
      },
      "datePublic": "2026-08-03T00:00:00.000Z",
      "title": "pnpm 11.0.0 before 11.11.0 Environment Variable Exfiltration via Proxy Settings",
      "descriptions": [
        {
          "lang": "en",
          "value": "pnpm versions 11.0.0 before 11.11.0 and 10.7.0 before 10.34.5 expand ${VAR} environment-variable placeholders in the httpProxy, httpsProxy, and noProxy settings read from a project's pnpm-workspace.yaml. Because the manifest is repository-controlled and the proxy keys were omitted from the request-destination key set that otherwise suppresses placeholder expansion for untrusted manifests (as already done for registry, pnprServer, registries and namedRegistries), an attacker who controls a repository's pnpm-workspace.yaml can cause a victim who clones the repository and runs a pnpm command (e.g. pnpm install) to expand environment secrets such as NPM_TOKEN or GITHUB_TOKEN into a proxy hostname or userinfo and route install traffic — and the corresponding DNS lookups — through an attacker-controlled host. The exfiltration occurs during configuration loading, before any lifecycle script executes. Fixed in pnpm 11.11.0 and 10.34.5."
        }
      ],
      "affected": [
        {
          "vendor": "pnpm",
          "product": "pnpm",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "11.0.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "11.11.0"
            },
            {
              "version": "11.11.0",
              "status": "unaffected",
              "versionType": "semver"
            }
          ]
        },
        {
          "vendor": "pnpm",
          "product": "pnpm",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "10.7.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "10.34.5"
            },
            {
              "version": "10.34.5",
              "status": "unaffected",
              "versionType": "semver"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Insertion of Sensitive Information Into Sent Data",
              "cweId": "CWE-201",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/pnpm/pnpm/security/advisories/GHSA-vx52-2968-3vc6",
          "name": "GitHub Security Advisory (GHSA-vx52-2968-3vc6)",
          "tags": [
            "vendor-advisory"
          ]
        },
        {
          "url": "https://www.vulncheck.com/advisories/pnpm-11.0.0-before-11.11.0-environment-variable-exfiltration-via-proxy-settings",
          "name": "VulnCheck Advisory: pnpm 11.0.0 before 11.11.0 Environment Variable Exfiltration via Proxy Settings",
          "tags": [
            "third-party-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS"
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "NONE",
            "userInteraction": "REQUIRED",
            "scope": "CHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH"
          }
        }
      ]
    }
  }
}