Malware in fsextrra
Malware was discovered in the npm package fsextrra. Systems with this package installed or running are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with fsextrra installed or running
- Ecosystems
- Attack vectors
- Affected entities
- fsextrra
The npm package fsextrra was found to contain malware. According to the GitHub advisory, 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. The malicious package should be removed, though there is no guarantee that removal will eliminate all malicious software that may have been installed as a result of the initial compromise.\n\nThis represents a critical supply chain attack through a compromised npm package with potential for complete system compromise.
Indicators of compromise
- Packages
- fsextrra
Remediation
- Immediately isolate any system with fsextrra installed from the network
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the fsextrra package from all affected systems
- Conduct a full security audit and malware scan of affected systems
- Review system logs for any suspicious activity or unauthorized access
- Consider full system reimaging if complete compromise is suspected
Sources
- GitHub Advisory GHSA-224j-655w-2vrq · GitHub Advisory Database
Cite this entry
"Malware in fsextrra." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 30, 2026; last updated July 30, 2026. https://supplychainattack.org/incident/malware-in-fsextrra-0xlfvj
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