PYSEC-2026-1070
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/langchain-core-mcp/PYSEC-2026-1070.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-1070
- Aliases
- Published
- 2026-07-07T16:04:20Z
- Modified
- 2026-07-07T17:00:05Z
- Summary
- Malicious code in langchain-core-mcp (PyPI)
- Details
-
Part of the "Hades" wave of the Shai-Hulud supply-chain campaign. On 2026-06-08, malicious phantom releases of langchain-core-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.
- References
-
- https://inspector.pypi.io/project/langchain-core-mcp/1.4.3/packages/51/de/fc5e079bf959bc729044aa0bf8139e87567689d59ee9611ed2a5929ef77a/langchain_core_mcp-1.4.3-py3-none-any.whl/langchain_core-setup.pth
- https://www.endorlabs.com/learn/shai-hulud-hades-wave-hits-six-pypi-bioinformatics-packages
- https://www.stepsecurity.io/blog/the-hades-campaign-pypi-packages
Affected packages
PyPI / langchain-core-mcp
Package
- Name
- langchain-core-mcp
- View open source insights on deps.dev
- Purl
- pkg:pypi/langchain-core-mcp