Malware in express-deflect
Malware discovered in the npm package express-deflect. Systems with this package installed or running are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with express-deflect installed or running is considered fully compromised.
- Ecosystems
- Attack vectors
- Affected entities
- express-deflect
A critical malware incident has been identified in the npm package express-deflect. According to the GitHub Advisory (GHSA-968w-6262-r9f5), 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 package compromise.\n\nThis represents a severe supply chain attack affecting all users of the express-deflect package.
Indicators of compromise
- Packages
- express-deflect
Remediation
- Immediately isolate any system with express-deflect installed from the network
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the express-deflect package from all affected systems
- Conduct a full forensic investigation of affected systems for additional malware
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider full system reimaging if compromise is confirmed
Sources
- GitHub Advisory GHSA-968w-6262-r9f5 · GitHub Advisory Database
Cite this entry
"Malware in express-deflect." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 7, 2026; last updated July 7, 2026. https://supplychainattack.org/incident/malware-in-express-deflect-90jpy9
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