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Malware in express-firegate

Malware discovered in the npm package express-firegate. Systems with this package installed are considered fully compromised and require immediate remediation.

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Disclosed
Last updated
Blast radius
Any system with express-firegate installed or running
Ecosystems
Attack vectors
Affected entities
  • express-firegate

The npm package express-firegate has been identified as containing malware. According to the GitHub Advisory (GHSA-59r7-h2ch-m4v2), any computer with this package installed or running should be considered fully compromised.\n\nThe advisory indicates that all secrets and keys stored on affected computers should 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\nThis represents a critical supply chain attack through a compromised npm package with potential for complete system takeover.

Indicators of compromise

Packages
  • express-firegate

Remediation

  • Immediately isolate any system with express-firegate installed from the network
  • Rotate all secrets, API keys, and credentials from a different, uncompromised computer
  • Remove the express-firegate package from all affected systems
  • Conduct a full forensic analysis of affected systems to identify any additional malicious software
  • Review system logs and access patterns for signs of unauthorized activity
  • Consider full system rebuild if the system handles sensitive data or has privileged access

Sources

  1. GitHub Advisory GHSA-59r7-h2ch-m4v2 · GitHub Advisory Database

Cite this entry

"Malware in express-firegate." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 7, 2026; last updated July 7, 2026. https://supplychainattack.org/incident/malware-in-express-firegate-11mk99

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