{
  "affected": [
    {
      "database_specific": {
        "cwes": [
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          }
        ],
        "indicators": {
          "evidence_files": [
            {
              "path": "index.js",
              "sha256": "8651a3e22896696142fc14d510aac386d3829d5376c2c33b4aacc56b39a7721f",
              "tlsh": "38712fe438fb72a0028322ed6b8b6519b131e0333009c994fa8de6916f955349797eec"
            }
          ],
          "package_integrity": [
            {
              "filename": "forge-gas-diff-1.0.0.tgz",
              "hashes": {
                "sha1": "e0fa210630abe85cb00178c23a6f20276a6b8551",
                "sha512_sri": "sha512-R+o/Lsf73lMSd6jCJQdyTMLGEe2y0PlDffb+u2tciAnYdTJJ6P53CFAGHCtVn1ZZOE+rgILPaRxHBuZW/Aqd+w=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "forge-gas-diff"
      },
      "versions": [
        "1.0.0",
        "1.0.1"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-016870",
        "import_time": "2026-08-07T12:23:25.114212002Z",
        "modified_time": "2026-08-07T12:09:35Z",
        "sha256": "4b1f6143f5a7c6106ab4ba0a21a6adaf9020e332835b1e528de6f36b64537734",
        "source": "amazon-inspector",
        "versions": [
          "1.0.0"
        ]
      },
      {
        "id": "IN-MAL-2026-017199",
        "import_time": "2026-08-08T00:53:10.172517816Z",
        "modified_time": "2026-08-08T00:52:29Z",
        "sha256": "8af09f105251f3c5b76ac9a11592a9af1cfb901b073472c57362c51c0a85fd2a",
        "source": "amazon-inspector",
        "versions": [
          "1.0.1"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (4b1f6143f5a7c6106ab4ba0a21a6adaf9020e332835b1e528de6f36b64537734)\nindex.js is advertised as a Foundry gas-report diff utility but on module load / CLI run schedules a setTimeout of 259,200,000 ms (3 days) that calls https.get against https://gist.githubusercontent.com/opensource-crypto/3946ef88aa057c9d10f1a7d80391d164/raw/default.json. The gist is hosted on a GitHub account (opensource-crypto) unrelated to the declared package publisher (danird9). If the fetched JSON contains a `c2` field, the value is persisted to ~/.forge-gas-diff.remote for later use. A separate getInstallId() routine writes a per-host UUID to ~/.forge-gas-diff, providing a stable install fingerprint. None of this behavior \u2014 outbound network fetch, install-ID generation, remote-config persistence, or a field literally named `c2` \u2014 has any relationship to the advertised gas-diff functionality and is not documented in the package. The gist is author-mutable, so the content delivered to installers can be changed at any time without republishing the package; the 3-day delay places the fetch well outside typical install-time sandboxing windows. The mechanism is the staging half of a remote-config-driven dropper: a hidden update channel keyed to attacker-editable content on a third-party host, with persistence to a well-known filesystem path on the installer\u0027s machine.\n",
  "id": "MAL-2026-13516",
  "modified": "2026-08-08T00:55:07.646091193Z",
  "published": "2026-08-07T12:09:35Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/forge-gas-diff/v/1.0.0"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/forge-gas-diff/v/1.0.1"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in forge-gas-diff (npm)"
}