Malware in modulyn
The npm package modulyn was found to contain malware that grants full system compromise to attackers. Any computer with this package installed or running should be considered fully compromised and all secrets and keys rotated immediately from a different machine.
- Disclosed
- Last updated
- Blast radius
- Any system with modulyn installed or running
- Ecosystems
- Attack vectors
- Affected entities
- modulynnpm package containing malware
The npm package modulyn has been identified as containing malware. According to the GitHub Advisory (GHSA-465x-gj74-mw3m), any computer that has 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 computer. 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 initial compromise, given that the attacker may have gained full control of the system.\n\nAffected users should treat any system that has run this package as potentially containing persistent malware and take appropriate incident response measures.
Indicators of compromise
- Packages
- modulyn
Remediation
- Immediately isolate any computer that has installed or run the modulyn package from the network
- Rotate all secrets, API keys, credentials, and cryptographic keys from a different, uncompromised computer
- Remove the modulyn package from all systems
- Conduct a full forensic investigation and malware scan of affected systems
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider full system reimaging if the compromise is confirmed to be persistent
Sources
- GitHub Advisory GHSA-465x-gj74-mw3m · GitHub Advisory Database
Cite this entry
"Malware in modulyn." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 6, 2026; last updated July 6, 2026. https://supplychainattack.org/incident/malware-in-modulyn-11mt24
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