{
  "affected": [
    {
      "database_specific": {
        "cwes": [
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          }
        ],
        "indicators": {
          "evidence_files": [
            {
              "path": "postinstall.js",
              "sha256": "c859191e9d7e04d59b5d2f566799feb31594a68573350bd17661be469e8663ef",
              "tlsh": "0ae1fa6a05fe1132226235f4694b50156776d1633504fbf4b9dd8280afcf0ba42bb7ed"
            },
            {
              "path": "package.json",
              "sha256": "0460202496c4e21d871ff51598019aeb1d27b5083ebf22611dc5456a64d0dbaa",
              "tlsh": "1ee02230c5314f33a4d829a90d37264660aa296387083c2863eb426c4bdc77b88ff32d"
            }
          ],
          "package_integrity": [
            {
              "filename": "common-1.999.999.tgz",
              "hashes": {
                "sha1": "f1278ee12b8adc385a28b5847ebbaef5f4e41be7",
                "sha512_sri": "sha512-aVYGJ0N6KMZH6QKeZwlw88VVV1+9Nh1lLGmbI/R7fCWJvnLnoiBRe7op2ptvfDIokoyiyPKyCuvJmvfs33mT0Q=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "@coopeuch/common"
      },
      "versions": [
        "1.999.999"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-021433",
        "import_time": "2026-10-11T14:18:05.240602486Z",
        "modified_time": "2026-10-11T13:58:48Z",
        "sha256": "887c41c0805d7d223c499e702796cf46727b0be152b7c8a65607907afb3b5d59",
        "source": "amazon-inspector",
        "versions": [
          "1.999.999"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (887c41c0805d7d223c499e702796cf46727b0be152b7c8a65607907afb3b5d59)\n@coopeuch/common@1.999.999 publishes to the public npm registry under a scope the publisher does not own, using an inflated version (1.999.999) consistent with the dependency-confusion technique that outranks internal-registry versions. The package\u0027s declared postinstall script (postinstall.js) runs automatically on npm install and collects installer-side host and network data \u2014 hostname, username, uid/gid, home directory, non-internal network interface addresses with MAC/CIDR, DNS resolver addresses, reverse-DNS internal FQDN, container markers, CI environment-variable presence, npm_config_registry, and the consuming project\u0027s package name/version/declared range \u2014 then POSTs it as JSON to the hardcoded author-controlled endpoint https://collector.oob.s4yhii.com/_npm-poc/beacon. A secondary DNS beacon is emitted via dns.lookup to a subdomain of oob.s4yhii.com. Any build that resolves @coopeuch/common from the public registry (including internal builds referencing the @coopeuch scope) will auto-exfiltrate internal hostnames, MAC addresses, usernames, internal registry URLs, and project identity to a third-party collector at install time. The package\u0027s README self-labels this as a coordinated-disclosure proof of concept; the harvesting and off-host upload nonetheless occur without installer opt-in.\n",
  "id": "MAL-2026-17760",
  "modified": "2026-10-11T13:58:48Z",
  "published": "2026-10-11T13:58:48Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@coopeuch/common/v/1.999.999"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in @coopeuch/common (npm)"
}