fastgram

GHSA-g62m-5cmr-q3x3

Malicious code in fastgram (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## Source: kam193 (bbc47050a01cdb07bbf87c6a6f47028545200c85d553a4952b686a705a6d7d3c)
Clone of Telethon package that exfiltrates credentials. See client/telegrambaseclient.py L608-626 (exfiltration function) and client/auth.py L163 (usage).


---

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


Campaign: 2025-04-fastgram


Reasons (based on the campaign):


 - clones-real-package


 - action-hidden-in-lib-usage


 - exfiltration-generic

---

Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/fastgram/MAL-2025-191724.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/fastgram
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/fastgram/MAL-2025-191724.json
- https://github.com/advisories/GHSA-g62m-5cmr-q3x3

Compromised versions (1)

= 1.0.0

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