polymarket-data-fetcher

GHSA-62w8-2w8j-4w6w

Malicious code in polymarket-data-fetcher (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.2.4`

## Source: kam193 (b6b5ac8b803d36ef490adff8a4d3110c4030063bbd2345e4b23d1871909638e9)
The code attempts to monitor the clipboard and replace copied cryptocurrency addresses, as well as establish persistence.


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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

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/polymarket-data-fetcher/MAL-2026-4286.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/polymarket-data-fetcher
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/polymarket-data-fetcher/MAL-2026-4286.json
- https://github.com/advisories/GHSA-62w8-2w8j-4w6w

Compromised versions (1)

= 1.2.4

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.