Malware in fs-extra-core
Malware was discovered in the npm package fs-extra-core. Systems with this package installed or running are considered fully compromised and require immediate remediation including secret rotation and package removal.
- Disclosed
- Last updated
- Blast radius
- Any system with fs-extra-core installed or running
- Ecosystems
- Attack vectors
- Affected entities
- fs-extra-corenpm package
A malware incident was identified in the npm package fs-extra-core. According to the GitHub advisory, any computer with this package installed or running should be considered fully compromised.
The 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.
This represents a critical supply chain compromise affecting the npm ecosystem.
Indicators of compromise
- Packages
- fs-extra-core
Remediation
- Immediately rotate all secrets and keys from a different, uncompromised computer
- Remove the fs-extra-core package from all affected systems
- Conduct a full security audit of any system that had fs-extra-core installed
- Monitor for signs of unauthorized access or data exfiltration
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical systems are involved
Sources
- GitHub Advisory GHSA-f246-8cf4-26v7 · GitHub Advisory Database
Cite this entry
"Malware in fs-extra-core." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 23, 2026; last updated July 23, 2026. https://supplychainattack.org/incident/malware-in-fs-extra-core-aqg7tt
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