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PYSEC-2026-583

Malicious code in nhmpy (PyPI)

Details

Part of the "Hades" wave of the Shai-Hulud supply-chain campaign. On 2026-06-08, malicious phantom releases of nhmpy were published to PyPI using stolen credentials. The package executes a bundled JavaScript payload (via the Bun runtime) on import that harvests and exfiltrates credentials and attempts self-propagation. This entry is a summary; behavior may not be fully characterized here. See the linked references for detailed analysis and indicators of compromise.

Are you affected?

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Affected packages

PyPI / nhmpy

No fixed version published yet for nhmpy (pip). Pin to a known-safe version or switch to an alternative.

References

https://inspector.pypi.io/project/nhmpy/2.4.7/packages/ca/a3/521ed09bd244da54e05fd9ed4eac9422dcb96d1c1af267bcabdd370f2533/nhmpy-2.4.7-py3-none-any.whl//nhmpy-setup.pth [EVIDENCE]
https://www.endorlabs.com/learn/shai-hulud-hades-wave-hits-six-pypi-bioinformatics-packages [ARTICLE]
https://www.stepsecurity.io/blog/the-hades-campaign-pypi-packages [ARTICLE]