mnemoniclib

GHSA-jxrr-g6w9-p7q6

Malicious code in mnemoniclib (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.20.1`

## Source: kam193 (c88fa4e30e2437fef5f03db434adb0f34ee48d8bec2d3361d123b10086b28772)
Clone of a legitimate library with added malicious code that runs during generating a new mnemonic. The malicious code collects data related to cryptocurrency wallets and selected other files, and exfiltrate them to a hardcoded location.


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


Campaign: 2026-03-mnemoniclib


Reasons (based on the campaign):


 - clones-real-package


 - action-hidden-in-lib-usage


 - crypto-related


 - exfiltration-crypto


 - files-exfiltration

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/mnemoniclib/MAL-2026-2299.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/mnemoniclib
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/mnemoniclib/MAL-2026-2299.json
- https://github.com/advisories/GHSA-jxrr-g6w9-p7q6

Compromised versions (1)

= 0.20.1

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