Malware in anthropic-setup
The npm package anthropic-setup contains malware that grants full system compromise to an outside entity. Any computer with this package installed or running should be considered fully compromised.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- anthropic-setupnpm package containing malware
The npm package anthropic-setup has been identified as containing malware. According to the GitHub Advisory (GHSA-6mwf-mqp4-2f69), any computer that has this package installed or running should be considered fully compromised.\n\nThe advisory recommends that all secrets and keys stored on affected computers be rotated immediately from a different, uncompromised system. While the package should be removed, there is no guarantee that removal will eliminate all malicious software that may have been installed as a result of the initial compromise, given that the attacker may have gained full control of the system.\n\nUsers should treat any system that has run this package as potentially containing persistent malware and take appropriate incident response measures.
Indicators of compromise
- Packages
- anthropic-setup
Remediation
- Immediately remove the anthropic-setup package from all systems
- Rotate all secrets, API keys, and credentials from a clean, uncompromised computer
- Assume full system compromise and perform forensic analysis or rebuild affected systems
- Check npm audit logs and package.json files for presence of anthropic-setup
- Monitor for any suspicious activity or unauthorized access on affected systems
- Consider the affected system as potentially containing persistent malware even after package removal
Sources
- GitHub Advisory GHSA-6mwf-mqp4-2f69 · GitHub Advisory Database
Cite this entry
"Malware in anthropic-setup." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed August 17, 2026; last updated August 17, 2026. https://supplychainattack.org/incident/malware-in-anthropic-setup-ab42d8
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