Malware in decimal-format-core
The npm package decimal-format-core was found to contain malware. Any system with this package installed is considered fully compromised and requires immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed
- Ecosystems
- Attack vectors
- Affected entities
- decimal-format-corenpm package
The npm package decimal-format-core was identified as containing malware. According to the GitHub advisory, 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 compromise.\n\nThe package has been flagged on GitHub's advisory database with critical severity, indicating the serious nature of the threat posed by this malware-laden dependency.
Indicators of compromise
- Packages
- decimal-format-core
Remediation
- Immediately remove the decimal-format-core package from all affected systems
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Perform a full security audit and malware scan of any system that had this package installed
- Review system logs for any unauthorized access or suspicious activity during the period the package was installed
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical systems are involved
Sources
- GitHub Advisory GHSA-jpc6-jpfr-f453 · GitHub Advisory Database
Cite this entry
"Malware in decimal-format-core." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 13, 2026; last updated July 13, 2026. https://supplychainattack.org/incident/malware-in-decimal-format-core-zugzwa
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