cflashfiles

GHSA-36fg-h2cw-989c

Malicious code in cflashfiles (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 2.1`

## Source: kam193 (d8c5174968b7dedf000076201fe6446018aa61048b6a77fc8bc42e16bb796fd9)
Malicious clone of legitimate fsspec package. The code was modified to exfiltrate specific files on import.


---

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


Campaign: 2026-01-old-cflashfiles


Reasons (based on the campaign):


 - clones-real-package


 - files-exfiltration

---

Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/cflashfiles/MAL-2026-469.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/cflashfiles
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/cflashfiles/MAL-2026-469.json
- https://github.com/advisories/GHSA-36fg-h2cw-989c

Compromised versions (1)

= 2.1

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