Vulnerability-Lookup

MAL-2026-17177

Vulnerability from ossf_malicious_packages

Published

2026-09-25 02:39

Modified

2026-09-25 02:39

Summary

Malicious code in n8n-nodes-moonlet-utils (npm)

Details

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

Source: amazon-inspector (f49ee5bcbcb7e8f1028de4021134fdbbc895e737700cf82a834fb26d3b23dd05)

postinstall.js fetches an opaque binary from https://mkicom.com/.well-known/pki-validation/ct_dn8, writes it to /tmp/.nc, chmods it 0755, and launches it detached via spawn('/bin/sh', ['-c', 'setsid ' + OUT + '... &'], {detached:true}). The download URL is disguised under a .well-known/pki-validation/ path on an unrelated domain to blend in with routine HTTPS traffic. index.js is an empty stub (module.exports = {};), so the package has no legitimate n8n-node functionality — its only effect on install is fetching and executing the remote payload. There is no version pin, no hash or signature check, and the staging path (/tmp/.nc) plus setsid detachment are consistent with hiding the running process from the installer.

CWE

CWE-506 - The product contains code that appears to be malicious in nature.

Credits

Amazon Inspector inspector-research@amazon.com

JSON

To clipboard

{
  "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": "850a52ae587e25b5e32410204df3a326544b2cbcc3cfb874b936f5b127529d71",
              "tlsh": "3c0120e751f180116b3240dce063b53fa507f10266429de0f88c89234fc16bd493b9e8"
            }
          ],
          "package_integrity": [
            {
              "filename": "n8n-nodes-moonlet-utils-1.0.0.tgz",
              "hashes": {
                "sha1": "ad49d72503edb02ac6fb528c478cc48a60c0eed9",
                "sha512_sri": "sha512-dY0RsuSQroDN06PMWKZBLsQZuGTemoYRBGL8pWoH/Fgqqw533YG/XfUEm9ucsGsQOtUWhZktiajmpJnSHKVPCg=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "n8n-nodes-moonlet-utils"
      },
      "versions": [
        "1.0.0"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-020538",
        "import_time": "2026-09-25T02:45:28.750708802Z",
        "modified_time": "2026-09-25T02:39:58Z",
        "sha256": "f49ee5bcbcb7e8f1028de4021134fdbbc895e737700cf82a834fb26d3b23dd05",
        "source": "amazon-inspector",
        "versions": [
          "1.0.0"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (f49ee5bcbcb7e8f1028de4021134fdbbc895e737700cf82a834fb26d3b23dd05)\npostinstall.js fetches an opaque binary from https://mkicom.com/.well-known/pki-validation/ct_dn8, writes it to /tmp/.nc, chmods it 0755, and launches it detached via `spawn(\u0027/bin/sh\u0027, [\u0027-c\u0027, \u0027setsid \u0027 + OUT + \u0027... \u0026\u0027], {detached:true})`. The download URL is disguised under a `.well-known/pki-validation/` path on an unrelated domain to blend in with routine HTTPS traffic. index.js is an empty stub (`module.exports = {};`), so the package has no legitimate n8n-node functionality \u2014 its only effect on install is fetching and executing the remote payload. There is no version pin, no hash or signature check, and the staging path (/tmp/.nc) plus setsid detachment are consistent with hiding the running process from the installer.\n",
  "id": "MAL-2026-17177",
  "modified": "2026-09-25T02:39:58Z",
  "published": "2026-09-25T02:39:58Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/n8n-nodes-moonlet-utils/v/1.0.0"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in n8n-nodes-moonlet-utils (npm)"
}

Sightings

Author	Source	Type	Date	Other

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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