Description
Part of the "Hades" wave of the Shai-Hulud supply-chain campaign. On 2026-06-08,
malicious phantom releases of embiggen 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 | embiggen | 0.11.97 | — | PYSEC-2026-231 |
References
- https://inspector.pypi.io/project/embiggen/0.11.97/packages/c8/a7/de68666caa05cf898f209e962ebd6c4d22d56bb8432e870fe5ad5f0df52b/embiggen-0.11.97-py3-none-any.whl/embiggen/_index.js 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