MAL-2026-17640
Vulnerability from ossf_malicious_packages
Published
2026-10-07 00:01
Modified
2026-10-07 02:43
Summary
Malicious code in browser-metrics-plugin.contrib (npm)
Details

browser-metrics-plugin.contrib is a dependency-confusion package: it is described as a "Compatibility shim", uses version numbers up to 99.0.1, and its README calls it an "authorized dependency-confusion test". Each listed version has a postinstall script that runs node beacon.cjs on npm install, and index.js calls the same code when the package is imported; it POSTs the hostname, install path and current working directory over plain HTTP to http://185.158.107.175:8787/_ah/dc, and index.js exports a Proxy that returns no-op functions so builds importing the real package keep running. The npm account xwise8887 published these 6 versions, and 7 versions of troubleshooting with the same payload, on 2026-10-07 between 00:01 and 00:07 UTC.

CWE
  • CWE-506 - The product contains code that appears to be malicious in nature.
Credits
InvisiRisk, Inc. www.invisirisk.com mailto:research@invisirisk.com
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cwes": [
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          }
        ]
      },
      "package": {
        "ecosystem": "npm",
        "name": "browser-metrics-plugin.contrib"
      },
      "versions": [
        "0.0.1",
        "1.0.0",
        "1.1.0",
        "99.0.1",
        "1.0.1",
        "2.0.1"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "https://www.invisirisk.com",
        "mailto:research@invisirisk.com"
      ],
      "name": "InvisiRisk, Inc.",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "iocs": {
      "files": [
        {
          "digests": {
            "sha256": "a86a4da763bbb34c16f361abe7aab66d5df591b66867ac8160041f932159b08d"
          },
          "note": "Main entry point; calls beacon.cjs fire() on import and exports a no-op Proxy. Identical in all listed versions.",
          "paths": [
            "index.js"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "88be31855364b43e29af8f413bf77718668e433e9b99ecff86af611f691efbba"
          },
          "note": "postinstall script runs `node beacon.cjs`, which POSTs hostname, install path and cwd to http://185.158.107.175:8787/_ah/dc (browser-metrics-plugin.contrib@0.0.1).",
          "paths": [
            "package.json"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "ecf3c6444166022b6982dd2a76e79379bc457c5fadb0d5885372c74dd5fcc778"
          },
          "note": "Executed by the postinstall script of browser-metrics-plugin.contrib@0.0.1.",
          "paths": [
            "beacon.cjs"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "f685ef1fd4bf7e6c89a1d30f9a95fb2565bf43aef8926c47831ea406ce6ec68f"
          },
          "note": "postinstall script runs `node beacon.cjs`, which POSTs hostname, install path and cwd to http://185.158.107.175:8787/_ah/dc (browser-metrics-plugin.contrib@1.0.0).",
          "paths": [
            "package.json"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "ecf3c6444166022b6982dd2a76e79379bc457c5fadb0d5885372c74dd5fcc778"
          },
          "note": "Executed by the postinstall script of browser-metrics-plugin.contrib@1.0.0.",
          "paths": [
            "beacon.cjs"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "91930c57df71a1daf5175de4fc1321cd2141a74d5e65ba65bb27f29d3fda5d4c"
          },
          "note": "postinstall script runs `node beacon.cjs`, which POSTs hostname, install path and cwd to http://185.158.107.175:8787/_ah/dc (browser-metrics-plugin.contrib@1.1.0).",
          "paths": [
            "package.json"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "ecf3c6444166022b6982dd2a76e79379bc457c5fadb0d5885372c74dd5fcc778"
          },
          "note": "Executed by the postinstall script of browser-metrics-plugin.contrib@1.1.0.",
          "paths": [
            "beacon.cjs"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "ee6d3b15a0f508112999466fd4eb170cb891850297f3bed92d3d657937886d4f"
          },
          "note": "postinstall script runs `node beacon.cjs`, which POSTs hostname, install path and cwd to http://185.158.107.175:8787/_ah/dc (browser-metrics-plugin.contrib@99.0.1).",
          "paths": [
            "package.json"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "ecf3c6444166022b6982dd2a76e79379bc457c5fadb0d5885372c74dd5fcc778"
          },
          "note": "Executed by the postinstall script of browser-metrics-plugin.contrib@99.0.1.",
          "paths": [
            "beacon.cjs"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "24fddf171255e79f57cafdc4f3f98f3b4beb61fd5f655c2dd2ac7ba2a657a678"
          },
          "note": "postinstall script runs `node beacon.cjs`, which POSTs hostname, install path and cwd to http://185.158.107.175:8787/_ah/dc (browser-metrics-plugin.contrib@1.0.1).",
          "paths": [
            "package.json"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "ecf3c6444166022b6982dd2a76e79379bc457c5fadb0d5885372c74dd5fcc778"
          },
          "note": "Executed by the postinstall script of browser-metrics-plugin.contrib@1.0.1.",
          "paths": [
            "beacon.cjs"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "fd6ab85e9991034a33de280acf3acba5c15ea35210227017a764df9c420ff1e8"
          },
          "note": "postinstall script runs `node beacon.cjs`, which POSTs hostname, install path and cwd to http://185.158.107.175:8787/_ah/dc (browser-metrics-plugin.contrib@2.0.1).",
          "paths": [
            "package.json"
          ],
          "source": "PACKAGE_ARCHIVE"
        },
        {
          "digests": {
            "sha256": "ecf3c6444166022b6982dd2a76e79379bc457c5fadb0d5885372c74dd5fcc778"
          },
          "note": "Executed by the postinstall script of browser-metrics-plugin.contrib@2.0.1.",
          "paths": [
            "beacon.cjs"
          ],
          "source": "PACKAGE_ARCHIVE"
        }
      ],
      "ips": [
        "185.158.107.175"
      ],
      "urls": [
        "http://185.158.107.175:8787/_ah/dc"
      ]
    }
  },
  "details": "browser-metrics-plugin.contrib is a dependency-confusion package: it is described as a \"Compatibility shim\", uses version numbers up to 99.0.1, and its README calls it an \"authorized dependency-confusion test\". Each listed version has a postinstall script that runs `node beacon.cjs` on npm install, and index.js calls the same code when the package is imported; it POSTs the hostname, install path and current working directory over plain HTTP to `http://185.158.107.175:8787/_ah/dc`, and index.js exports a Proxy that returns no-op functions so builds importing the real package keep running. The npm account xwise8887 published these 6 versions, and 7 versions of troubleshooting with the same payload, on 2026-10-07 between 00:01 and 00:07 UTC.",
  "id": "MAL-2026-17640",
  "modified": "2026-10-07T02:43:30Z",
  "published": "2026-10-07T00:01:40Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/browser-metrics-plugin.contrib"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in browser-metrics-plugin.contrib (npm)"
}



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