Malware in numdifftools
Malware discovered in the npm package numdifftools. Systems with this package installed are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- numdifftools
A critical malware incident was identified in the npm package numdifftools. According to the GitHub Security Advisory (GHSA-fv2r-6vq4-5x8r), any computer with this package installed or running should be considered fully compromised.\n\nThe advisory recommends immediate action: all secrets and keys stored on affected computers should be rotated 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 compromise, as the attacker may have gained full control of the system.\n\nAffected users should treat this as a critical security incident requiring comprehensive system remediation and credential rotation.
Indicators of compromise
- Packages
- numdifftools
Remediation
- Immediately rotate all secrets and keys from a different, uncompromised computer
- Remove the numdifftools package from all affected systems
- Conduct a comprehensive security audit of all systems that had the package installed
- Monitor affected systems for signs of unauthorized access or persistence mechanisms
- Consider full system reimaging if full compromise is suspected
- Review access logs and audit trails for any suspicious activity during the period the package was installed
Sources
- GitHub Advisory GHSA-fv2r-6vq4-5x8r · GitHub Advisory Database
Cite this entry
"Malware in numdifftools." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 15, 2026; last updated June 16, 2026. https://supplychainattack.org/incident/malware-in-numdifftools-bvd7ip
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