codefrequencychecker

GHSA-524p-6x5m-hwf7

Malicious code in codefrequencychecker (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.0.1`

## Source: kam193 (4202ead7b36e01a039c10a9379f617de02b50d5a69d5923652cfafb6f22067b6)
Package exfiltrates browser cookies and passwords, and starts a Telegram bot allowing re-exfiltrating later.


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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

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/codefrequencychecker/MAL-2026-126.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/codefrequencychecker
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/codefrequencychecker/MAL-2026-126.json
- https://github.com/advisories/GHSA-524p-6x5m-hwf7

Compromised versions (1)

= 0.0.1

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