Malware in f0-data-constructor
Malware was discovered in the npm package f0-data-constructor. Systems with this package installed or running should be considered fully compromised, with all secrets and keys requiring immediate rotation from a different computer.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- f0-data-constructor
The npm package f0-data-constructor was found to contain malware. According to the GitHub Advisory (GHSA-42r3-x9wh-9q73), any computer with 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, the advisory notes that full control of the computer may have been given to an outside entity, meaning removal of the package alone may not eliminate all malicious software that resulted from the installation.\n\nThe severity is classified as critical due to the potential for complete system compromise and the risk of credential theft.
Indicators of compromise
- Packages
- f0-data-constructor
Remediation
- Immediately rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the f0-data-constructor package from all affected systems
- Perform a full security audit and malware scan of any system that had this package installed
- Review system logs and access logs for any unauthorized 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-42r3-x9wh-9q73 · GitHub Advisory Database
Cite this entry
"Malware in f0-data-constructor." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 27, 2026; last updated July 27, 2026. https://supplychainattack.org/incident/malware-in-f0-data-constructor-2r2r60
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