callistopy

GHSA-wh5g-h8h4-344m

Malicious code in callistopy (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.3.6`

## Source: kam193 (c45e190afdbbb8d4b817c50734f8b01bc3bec65978141d4070ca2ec60be6b061)
Package creates a telegram client which silently exfiltrate user's Telegram data, including sessions and configuration, to a hardcoded remote target


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


Campaign: 2025-07-callistopy


Reasons (based on the campaign):


 - exfiltration-generic


 - action-hidden-in-lib-usage

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/callistopy/MAL-2025-191698.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/callistopy
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/callistopy/MAL-2025-191698.json
- https://github.com/advisories/GHSA-wh5g-h8h4-344m

Compromised versions (1)

= 0.3.6

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