lebinfmt

GHSA-rj6r-3p6x-8x67

Malicious code in lebinfmt (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## Source: kam193 (448ec8ad7c978d60f142f12780be3bb6ae7b90870fa4c2bf2d50ca7d4111cdfd)
This package is prepared to perform steganography decoding using the same code and was published on the same day as package 'rasterkit,' later used to deliver malicious payload.


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


Campaign: 2026-06-textwrap-toolkit-stager


Reasons (based on the campaign):


 - backdoor


 - obfuscation


 - crypto-related


 - Downloads and executes a remote malicious script.


 - exfiltration-crypto

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/lebinfmt/MAL-2026-10977.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/lebinfmt
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/lebinfmt/MAL-2026-10977.json
- https://github.com/advisories/GHSA-rj6r-3p6x-8x67

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.