PYSEC-2026-594
PYSEC-2026-594 · Malicious code in mrbios (PyPI)
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Part of the "Hades" wave of the Shai-Hulud supply-chain campaign. On 2026-06-08, malicious phantom releases of mrbios 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.
- Published
- Updated
Stack: python
Affected products and versions
mrbios PyPI
- Versions
- 0.1.1
- 0.1.2
No fix published
Original sources
- https://inspector.pypi.io/project/mrbios/0.1.2/packages/57/fb/c33c8829af52faa727d93f68688a53322e10e5f617c6b26f86f9c9ad35b9/mrbios-0.1.2-py3-none-any.whl//mrbios-setup.pth
- https://www.endorlabs.com/learn/shai-hulud-hades-wave-hits-six-pypi-bioinformatics-packages
- https://www.stepsecurity.io/blog/the-hades-campaign-pypi-pack
- https://osv.dev/vulnerability/PYSEC-2026-594