Malicious code in @dransay/feature-flags (npm)

{
  "id": "de7950743952711736e32dd2c937104caab2a3171a23e0648e5857a17135335a",
  "url": "https://osv.dev/vulnerability/MAL-2026-17696",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malicious code in @dransay/feature-flags (npm)",
    "summary": "@dransay/feature-flags@99.0.0 is a dependency-confusion probe claiming the internal `@dransay/*` namespace, not an identified public package. Its `preinstall` hook runs on npm install as `node beacon.js` and sends a DNS lookup and an HTTPS GET to `db3klhbi6i9hark1kegg174t38h33b6wt.oast.site`, using the package name in the request; npm account `0xamino_hunter` published it on 2026-10-08. --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (cc545bbb96903ee25218d8cab1a7d116d2ceb1ba64a3c929c79e56a6fc8e0585) @dransay/feature-flags@99.0.0 publishes a scoped name on the public npm registry at an inflated version (99.0.0) designed to win semver resolution against any private internal @dransay/* copy. package.json declares a preinstall hook `node beacon.js`; beacon.js unconditionally performs a DNS lookup and HTTPS GET to the hardcoded interactsh callback host db3klhbi6i9hark1kegg174t38h33b6wt.oast.site on every `npm install`, leaking the installer's public source IP, a timestamp, and confirmation that the scoped name resolved from the public registry to a third-party out-of-band interaction collector. The README self-describes the artifact as a probe of DrAnsay build infrastructure; author self-labeling as research does not change the install-time behavior for any environment whose npm resolves @dransay/* publicly.",
    "evidence": "osv:MAL-2026-17696",
    "products": [
      {
        "name": {
          "value": "@dransay/feature-flags",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "99.0.0",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "MAL-2026-17696",
      "aliases": [
        "MAL-2026-17696"
      ],
      "affected": [
        {
          "package": {
            "name": "@dransay/feature-flags",
            "purl": "pkg:npm/%40dransay/feature-flags",
            "ecosystem": "npm"
          },
          "versions": [
            "99.0.0"
          ],
          "database_specific": {
            "cwes": [
              {
                "name": "Embedded Malicious Code",
                "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."
              }
            ],
            "source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@dransay/feature-flags/MAL-2026-17696.json",
            "indicators": {
              "evidence_files": [
                {
                  "path": "beacon.js",
                  "tlsh": "541165ad4ae42b00b1e9f4a8988e01e94f73d1a8844946c0f1cec3ab5e9347c17674fb",
                  "sha256": "5ba13afc2e6d6acf3876a0d06bf8e0e81046d1174bbe4c23ca147c313da3df53"
                },
                {
                  "path": "package.json",
                  "tlsh": "7be0f1546f402e3300cd14f11d2c919752f39c6e531c2d4851cb030f536d53553bb19c",
                  "sha256": "f3a916de7c5f5312d3f7f3668fc348be0594f74cb74942df7b88af81b61a9056"
                }
              ],
              "package_integrity": [
                {
                  "hashes": {
                    "sha1": "fcebaa3f8c486545a35613aa3d4489f11ef3484a",
                    "sha512_sri": "sha512-42rlCO5zyc1wEX+A5hlFsMwnAbN0YpRFEcWGF3SSvGdZ8YZV7ucO0L7XGv/FORTAV1U1lzyzWlWNF7BkNWUD3A=="
                  },
                  "filename": "feature-flags-99.0.0.tgz"
                }
              ]
            }
          }
        }
      ],
      "modified": "2026-10-12T04:45:05.837867768Z",
      "provider": "osv",
      "references": [
        "https://www.npmjs.com/package/@dransay/feature-flags/v/99.0.0",
        "https://www.npmjs.com/package/@dransay/feature-flags"
      ],
      "provider_metadata": {
        "iocs": {
          "urls": [
            "https://db3klhbi6i9hark1kegg174t38h33b6wt.oast.site/feature-flags"
          ],
          "files": [
            {
              "note": "preinstall script: node beacon.js",
              "paths": [
                "package.json"
              ],
              "source": "PACKAGE_ARCHIVE",
              "digests": {
                "sha256": "f3a916de7c5f5312d3f7f3668fc348be0594f74cb74942df7b88af81b61a9056"
              }
            },
            {
              "note": "Executed by the preinstall script of @dransay/feature-flags@99.0.0.",
              "paths": [
                "beacon.js"
              ],
              "source": "PACKAGE_ARCHIVE",
              "digests": {
                "sha256": "5ba13afc2e6d6acf3876a0d06bf8e0e81046d1174bbe4c23ca147c313da3df53"
              }
            }
          ],
          "domains": [
            "db3klhbi6i9hark1kegg174t38h33b6wt.oast.site"
          ]
        },
        "malicious-packages-origins": [
          {
            "id": "IN-MAL-2026-021215",
            "sha256": "cc545bbb96903ee25218d8cab1a7d116d2ceb1ba64a3c929c79e56a6fc8e0585",
            "source": "amazon-inspector",
            "versions": [
              "99.0.0"
            ],
            "import_time": "2026-10-08T17:17:19.429819003Z",
            "modified_time": "2026-10-08T16:54:29Z"
          }
        ]
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 298560,
  "published_at": "2026-10-08T07:58:52+00:00"
}