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PYSEC-2026-1075

Malicious code in tiktoken-mcp (PyPI)

상세

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

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

참고

https://inspector.pypi.io/project/tiktoken-mcp/0.13.2/packages/5c/58/895febe9c7cc34d3e4d64699ec40ac0b378392db3cfda3c93b7af27da95d/tiktoken_mcp-0.13.2-py3-none-any.whl/tiktoken-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]