{"id":"PYSEC-2026-231","summary":"Malicious code in embiggen (PyPI)","details":"Part of the \"Hades\" wave of the Shai-Hulud supply-chain campaign. On 2026-06-08,\nmalicious phantom releases of embiggen were published to PyPI using stolen\ncredentials. The package executes a bundled JavaScript payload (via the Bun\nruntime) on import that harvests and exfiltrates credentials and attempts\nself-propagation. This entry is a summary; behavior may not be fully\ncharacterized here. See the linked references for detailed analysis and\nindicators of compromise.\n","aliases":["MAL-2026-5314"],"modified":"2026-06-26T23:11:29.752335Z","published":"2026-06-25T14:36:27Z","references":[{"type":"EVIDENCE","url":"https://inspector.pypi.io/project/embiggen/0.11.97/packages/c8/a7/de68666caa05cf898f209e962ebd6c4d22d56bb8432e870fe5ad5f0df52b/embiggen-0.11.97-py3-none-any.whl/embiggen/_index.js"},{"type":"ARTICLE","url":"https://www.endorlabs.com/learn/shai-hulud-hades-wave-hits-six-pypi-bioinformatics-packages"},{"type":"ARTICLE","url":"https://www.stepsecurity.io/blog/the-hades-campaign-pypi-packages"}],"affected":[{"package":{"name":"embiggen","ecosystem":"PyPI","purl":"pkg:pypi/embiggen"},"versions":["0.11.97"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/embiggen/PYSEC-2026-231.yaml"}}],"schema_version":"1.7.5"}