MAL-2026-4286

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/polymarket-data-fetcher/MAL-2026-4286.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-4286
Published
2026-05-24T18:23:49Z
Modified
2026-05-24T19:00:53.704007629Z
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

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "b6b5ac8b803d36ef490adff8a4d3110c4030063bbd2345e4b23d1871909638e9",
            "id": "pypi/2026-05-polymarket-data-fetcher/polymarket-data-fetcher",
            "source": "kam193",
            "modified_time": "2026-05-24T18:23:49.84682Z",
            "versions": [
                "1.2.4"
            ],
            "import_time": "2026-05-24T18:54:37.083069188Z"
        }
    ]
}
References
Credits

Affected packages

PyPI / polymarket-data-fetcher

Package

Name
polymarket-data-fetcher
View open source insights on deps.dev
Purl
pkg:pypi/polymarket-data-fetcher

Affected ranges

Affected versions

1.*
1.2.4

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/polymarket-data-fetcher/MAL-2026-4286.json"