Malware in anthropic-claude-latest
The npm package anthropic-claude-latest was found to contain malware, potentially giving attackers full control of affected systems. All systems with this package installed should be considered compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- anthropic-claude-latestnpm package containing malware
The npm package anthropic-claude-latest was identified as containing malware via GitHub Advisory GHSA-j588-p757-86r9. According to the advisory, any computer with this package installed or running should be considered fully compromised.\n\nThe malware grants outside entities potential full control of affected systems. The advisory recommends immediate rotation of all secrets and keys from a different, uncompromised computer. 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.\n\nThis represents a critical supply chain attack through a malicious npm package, likely targeting users of the Anthropic Claude API client library.
Indicators of compromise
- Packages
- anthropic-claude-latest
Remediation
- Immediately remove the anthropic-claude-latest package from all affected systems
- Rotate all secrets, API keys, and credentials from a clean, uncompromised computer
- Perform a full security audit and malware scan of any system that had this package installed
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical systems are involved
- Monitor for any suspicious activity on accounts or systems that may have been exposed
Sources
- GitHub Advisory GHSA-j588-p757-86r9 · GitHub Advisory Database
Cite this entry
"Malware in anthropic-claude-latest." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 17, 2026; last updated July 17, 2026. https://supplychainattack.org/incident/malware-in-anthropic-claude-latest-gj5cby
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