Description
Part of the "Hades" wave of the Shai-Hulud supply-chain campaign. On 2026-06-08,
malicious phantom releases of ray-mcp-server 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
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | ray-mcp-server | 0.2.1 | — | PYSEC-2026-1074 |
References
- https://inspector.pypi.io/project/ray-mcp-server/0.2.1/packages/40/35/d09e9a3b7802bbbae86b8b9a207b9687101dcb0534e35e3cb35d0383a4de/ray_mcp_server-0.2.1-py3-none-any.whl/ray_mcp_server-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