Malware in myclaude-code
Malware was discovered in the npm package myclaude-code. Any computer with this package installed or running should be considered fully compromised, with all secrets and keys requiring immediate rotation from a different system.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- myclaude-code
The npm package myclaude-code was found to contain malware. According to the GitHub Advisory (GHSA-f5r3-gf4p-pf67), any system that has installed or executed this package should be treated as fully compromised.\n\nThe advisory recommends that all secrets and cryptographic keys stored on affected computers be rotated immediately from a different, uncompromised system. While the malicious 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\nAffected users should assume complete system compromise and take appropriate incident response measures.
Indicators of compromise
- Packages
- myclaude-code
Remediation
- Immediately rotate all secrets, API keys, and cryptographic credentials from a different, uncompromised computer
- Remove the myclaude-code package from all affected systems
- Perform a full security audit and malware scan of any system that had this package installed or running
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider full system reimaging if the package was installed on production or sensitive systems
- Notify any services or systems that may have been accessed using credentials stored on compromised machines
Sources
- GitHub Advisory GHSA-f5r3-gf4p-pf67 · GitHub Advisory Database
Cite this entry
"Malware in myclaude-code." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 9, 2026; last updated July 9, 2026. https://supplychainattack.org/incident/malware-in-myclaude-code-14ldak
Suggest a correction
Found an error or have a newer source? Corrections to factual errors take priority over new entries.
Related incidents
- containedcritical
Malware in arc-diag-util
The npm package arc-diag-util was found to contain malware, resulting in full system compromise of any computer with the package installed or running. All secrets and keys should be rotated immediately from a different machine, and the package should be removed.
npmCompromised package - activecritical
Malware in rendezvous-js
The npm package rendezvous-js contains malware that grants full control of affected systems. Any computer with this package installed or running should be considered fully compromised.
npmCompromised package - activecritical
Malware in banana-stand
The npm package banana-stand contains malware that grants full system compromise to an outside entity. Any computer with this package installed or running should be considered fully compromised.
npmCompromised package - containedcritical
Malware in leb128x
The npm package leb128x was found to contain malware that grants full system compromise to attackers. Any computer with this package installed or running should be considered fully compromised and all secrets and keys rotated immediately from a different machine.
npmCompromised package