mal-2026-126
Vulnerability from ossf_malicious_packages
Published
2026-01-07 10:05
Modified
2026-01-07 10:05
Summary
Malicious code in codefrequencychecker (PyPI)
Details

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

Source: kam193 (4202ead7b36e01a039c10a9379f617de02b50d5a69d5923652cfafb6f22067b6)

Package exfiltrates browser cookies and passwords, and starts a Telegram bot allowing re-exfiltrating later.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-01-codefrequencychecker

Reasons (based on the campaign):

  • exfiltration-browser-data

  • A Telegram webhook is used to send collected data.

  • infostealer

Credits
Kamil Mańkowski (kam193) github.com/kam193 bad-packages.kam193.eu/
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "codefrequencychecker"
      },
      "versions": [
        "0.0.1",
        "0.0.2",
        "0.0.3",
        "0.0.5",
        "0.0.7"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "https://github.com/kam193",
        "https://bad-packages.kam193.eu/"
      ],
      "name": "Kamil Ma\u0144kowski (kam193)",
      "type": "REPORTER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "pypi/2026-01-codefrequencychecker/codefrequencychecker",
        "import_time": "2026-01-07T10:42:27.223837213Z",
        "modified_time": "2026-01-07T10:05:21.320568Z",
        "sha256": "4202ead7b36e01a039c10a9379f617de02b50d5a69d5923652cfafb6f22067b6",
        "source": "kam193",
        "versions": [
          "0.0.1",
          "0.0.2",
          "0.0.3",
          "0.0.5",
          "0.0.7"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: kam193 (4202ead7b36e01a039c10a9379f617de02b50d5a69d5923652cfafb6f22067b6)\nPackage exfiltrates browser cookies and passwords, and starts a Telegram bot allowing re-exfiltrating later.\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-01-codefrequencychecker\n\n\nReasons (based on the campaign):\n\n\n - exfiltration-browser-data\n\n\n - A Telegram webhook is used to send collected data.\n\n\n - infostealer\n",
  "id": "MAL-2026-126",
  "modified": "2026-01-07T10:05:21Z",
  "published": "2026-01-07T10:05:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bad-packages.kam193.eu/pypi/package/codefrequencychecker"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in codefrequencychecker (PyPI)"
}


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  • 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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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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