{
  "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": "big.js",
              "sha256": "7d3c7d774ce3d9231e144c52830418ee9a38e7fd6f1c7d9f5c83c882ab8485ad",
              "tlsh": "cdc2658c3ac67579593363788f465088eb38525712c8b186b4ae63b46f78cb107b5fdc"
            },
            {
              "path": "package.json",
              "sha256": "57fed54dc425b3d763b4b2deb0d63e50ee2bb1ce117b5c52e3a01db76fd0c631",
              "tlsh": "6e212263c9b19da70af85b94b86c43aaf1161b2f00a05c57b07b130c4b7345b2095bbd"
            }
          ],
          "package_integrity": [
            {
              "filename": "ts-biginteger-lib-5.0.5.tgz",
              "hashes": {
                "sha1": "598e816ee6e49bf3264d46e4a35487d23aae0d84",
                "sha512_sri": "sha512-Qke1nuOGZtQUtQU0b9xNb9PyY8dCpItaCjavtbBnzvk1DiTsAEOgGD0Sq+j1yHh9bhSxkYyoUNoNqs9LayMzzQ=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "ts-biginteger-lib"
      },
      "versions": [
        "5.0.5"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-007259",
        "import_time": "2026-06-23T16:54:12.462976362Z",
        "modified_time": "2026-06-23T16:07:35Z",
        "sha256": "b8059a1d2db2edb7231b017023f82f6a651585c0ee7120aaebe882cb6407b9e3",
        "source": "amazon-inspector",
        "versions": [
          "5.0.5"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (b8059a1d2db2edb7231b017023f82f6a651585c0ee7120aaebe882cb6407b9e3)\nPackage is published as \u0027ts-biginteger-lib\u0027 but its metadata, README, and source are a wholesale copy of big.js by MikeMcl (author set to \u0027Michael Mclaughlin \u003cM8ch88l@gmail.com\u003e\u0027, repository pointing at MikeMcl/big.js, README unchanged). Inserted into the otherwise-verbatim big.js source at big.js:605-609 is a try/catch that, at module load time, calls `require(\"ts-lint-builders\")` and invokes `doc.from_str().then(...).catch(...)`. package.json additionally declares `\"ts-linter-builders\": \"latest\"` as a runtime dependency. The legitimate big.js declares no runtime dependencies; these injected loads execute arbitrary code from separately-published, attacker-controlled packages every time a consumer `require()`s or `import`s ts-biginteger-lib. The unpinned `latest` specifier lets the publisher rotate the payload at any time without modifying this package. The combination of brand impersonation (to attract installers searching for a TypeScript big-integer library) and require-time execution of an external, version-floating dependency is a supply-chain dropper.\n",
  "id": "MAL-2026-6316",
  "modified": "2026-06-23T16:07:35Z",
  "published": "2026-06-23T16:07:35Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/ts-biginteger-lib/v/5.0.5"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in ts-biginteger-lib (npm)"
}