mal-2026-4286
Vulnerability from ossf_malicious_packages
Published
2026-05-24 18:23
Modified
2026-05-24 18:23
Summary
Malicious code in polymarket-data-fetcher (PyPI)
Details

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

Source: kam193 (b6b5ac8b803d36ef490adff8a4d3110c4030063bbd2345e4b23d1871909638e9)

The code attempts to monitor the clipboard and replace copied cryptocurrency addresses, as well as establish persistence.

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

Campaign: 2026-05-polymarket-data-fetcher

Reasons (based on the campaign):

  • peristence-autorun

  • obfuscation

  • crypto-related

  • The package contains code to detect if it is running in a sandbox environment.

  • clipboard-modify

  • persistence

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

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "polymarket-data-fetcher"
      },
      "versions": [
        "1.2.4"
      ]
    }
  ],
  "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/2026-05-polymarket-data-fetcher/polymarket-data-fetcher",
        "import_time": "2026-05-24T18:54:37.083069188Z",
        "modified_time": "2026-05-24T18:23:49.84682Z",
        "sha256": "b6b5ac8b803d36ef490adff8a4d3110c4030063bbd2345e4b23d1871909638e9",
        "source": "kam193",
        "versions": [
          "1.2.4"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: kam193 (b6b5ac8b803d36ef490adff8a4d3110c4030063bbd2345e4b23d1871909638e9)\nThe code attempts to monitor the clipboard and replace copied cryptocurrency addresses, as well as establish persistence.\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-05-polymarket-data-fetcher\n\n\nReasons (based on the campaign):\n\n\n - peristence-autorun\n\n\n - obfuscation\n\n\n - crypto-related\n\n\n - The package contains code to detect if it is running in a sandbox environment.\n\n\n - clipboard-modify\n\n\n - persistence\n",
  "id": "MAL-2026-4286",
  "modified": "2026-05-24T18:23:49Z",
  "published": "2026-05-24T18:23:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bad-packages.kam193.eu/pypi/package/polymarket-data-fetcher"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in polymarket-data-fetcher (PyPI)"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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

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.



Detection rules are retrieved from Rulezet.