UNKNOWN PyPI Malware

Malicious code in phenopacket-store-toolkit (PyPI)

PYSEC-2026-234 · MAL-2026-5322

Published · Modified

Description

Part of the "Hades" wave of the Shai-Hulud supply-chain campaign. On 2026-06-08,
malicious phantom releases of phenopacket-store-toolkit 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.

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