Skip to content
OpenAdvisories
Malicious MAL-2025-191698

callistopy

PyPI package · versions 0.3.6, 0.1.0, 0.3.7, 0.3.91, 0.3.8, 0.3.9

Reported Jul 5, 2025 · Updated Dec 31, 2025

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

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

---

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