Malware in decimal-format-utils
The npm package decimal-format-utils 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
- decimal-format-utils
The npm package decimal-format-utils has been identified as containing malware. According to the GitHub Advisory (GHSA-63g4-gv37-rfv8), 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 an outside entity may have gained full control of the system.\n\nAffected users should treat any system that has run this package as potentially fully compromised and take appropriate incident response measures.
Indicators of compromise
- Packages
- decimal-format-utils
Remediation
- Immediately isolate any computer that has installed or run decimal-format-utils from the network
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the decimal-format-utils package from all systems
- Conduct a full forensic investigation and malware scan of affected systems
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider full system reimaging if the compromise is confirmed
Sources
- GitHub Advisory GHSA-63g4-gv37-rfv8 · GitHub Advisory Database
Cite this entry
"Malware in decimal-format-utils." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 30, 2026; last updated July 30, 2026. https://supplychainattack.org/incident/malware-in-decimal-format-utils-10l5oi
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