MAL-2026-3749
Vulnerability from ossf_malicious_packages
Published
2026-05-14 19:25
Modified
2026-05-15 07:39
Summary
Malicious code in @webapp-next/store (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (cbad3803cdda40845fe2aa64e0963b9293f9ee523b3f9205a354da2ae1e317bf)

package.json declares "preinstall": "node index.js", which runs automatically on npm install. index.js collects os.hostname(), os.platform(), os.arch(), os.homedir(), os.userInfo() (username, uid, gid, shell), OS release/memory/CPU info, process.cwd(), and the output of shell commands whoami and id, then POSTs the aggregated JSON to https://oia2jeijtfmt053ynp686t5riioac00p.oastify.com/testbydext. The destination is a Burp Suite Collaborator out-of-band interaction subdomain controlled by the attacker. The package has no legitimate functionality — index.js contains only the exfiltration payload, and package.json carries empty author/description fields under a scope (@webapp-next) that resembles a legitimate namespace, consistent with a dependency-confusion lure.

CWE
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
Credits
Amazon Inspector actran@amazon.com

{
  "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": "5e497bd84896699086b7444a0e8180f761affd89b916fa67093e9dbb4d231558",
              "tlsh": "c2515fc516f65a251ba7b8494a4f9002b327e0033649ee55bfcc8740af9837c97f0af2"
            },
            {
              "path": "package.json",
              "sha256": "0ad68eede34ba2906eb27bc9cbb196c5e58725334360cde0236341ec224ce542",
              "tlsh": "86d05e385e21653325c50296482b988672a18e2f09047c0877cb582c528e67798fb35c"
            }
          ],
          "package_integrity": [
            {
              "filename": "store-91.1.0.tgz",
              "hashes": {
                "sha1": "516f3f665050324eef513a15a26cebb6edbc8a59",
                "sha512_sri": "sha512-DHkuKgahyrLbuOlwGTkT7OJdRcj0nLvMAvcTvOG09xLYn+eMgGUdrXOrRdnxiahUEgtoTGV7sTdGaKXo4BxlZQ=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "@webapp-next/store"
      },
      "versions": [
        "91.1.0"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "actran@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-002798",
        "import_time": "2026-05-15T07:37:20.027681785Z",
        "modified_time": "2026-05-15T02:51:07Z",
        "sha256": "caf033fac1ae50b98e1a222c76831e7012e140234a28dd7e8d0a41a55cf388f7",
        "source": "amazon-inspector",
        "versions": [
          "91.1.0"
        ]
      },
      {
        "id": "IN-MAL-2026-002735",
        "import_time": "2026-05-15T07:37:18.661452149Z",
        "modified_time": "2026-05-14T19:25:34Z",
        "sha256": "cbad3803cdda40845fe2aa64e0963b9293f9ee523b3f9205a354da2ae1e317bf",
        "source": "amazon-inspector",
        "versions": [
          "91.1.0"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (cbad3803cdda40845fe2aa64e0963b9293f9ee523b3f9205a354da2ae1e317bf)\npackage.json declares \"preinstall\": \"node index.js\", which runs automatically on npm install. index.js collects os.hostname(), os.platform(), os.arch(), os.homedir(), os.userInfo() (username, uid, gid, shell), OS release/memory/CPU info, process.cwd(), and the output of shell commands `whoami` and `id`, then POSTs the aggregated JSON to https://oia2jeijtfmt053ynp686t5riioac00p.oastify.com/testbydext. The destination is a Burp Suite Collaborator out-of-band interaction subdomain controlled by the attacker. The package has no legitimate functionality \u2014 index.js contains only the exfiltration payload, and package.json carries empty author/description fields under a scope (@webapp-next) that resembles a legitimate namespace, consistent with a dependency-confusion lure.\n",
  "id": "MAL-2026-3749",
  "modified": "2026-05-15T07:39:04Z",
  "published": "2026-05-14T19:25:34Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@webapp-next/store/v/91.1.0"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in @webapp-next/store (npm)"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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