helmet-fastapi

GHSA-qqq3-22rv-h57g

Malicious code in helmet-fastapi (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.2`

## Source: kam193 (c1f805932ecbcd95197e98c6e2336eb773252abf5615fe135076d1848cb90395)
Package contains hidden code adding a backdoor - a WebSocket path handler which will execute commands sent by an attacker knowing the path. In addition, it adds a log handler to remove related access logs.


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


Campaign: 2025-04-helmet-fastapi


Reasons (based on the campaign):


 - backdoor


 - obfuscation

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/helmet-fastapi/MAL-2025-191752.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/helmet-fastapi
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/helmet-fastapi/MAL-2025-191752.json
- https://github.com/advisories/GHSA-qqq3-22rv-h57g

Compromised versions (1)

= 1.2

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