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Unscored PYSEC-2026-590 MAL-2026-5281

Malicious code in executor-http (PyPI)

Published Jun 30, 2026 · Updated Jul 1, 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 executor-http 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 executor-http 0.1.3, 0.1.4 — PYSEC-2026-590

References