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Unscored PYSEC-2026-611 MAL-2026-5279

Malicious code in uprobe (PyPI)

Published Jul 1, 2026 · Updated Jul 2, 2026 · Assigned by PYSEC

Description

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

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI uprobe 0.1.3, 0.1.4 — PYSEC-2026-611

References