Malware in fastify-addon
Malware discovered in the npm package fastify-addon. Systems with this package installed or running are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with fastify-addon installed or running
- Ecosystems
- Attack vectors
- Affected entities
- fastify-addonnpm package containing malware
The npm package fastify-addon has been identified as containing malware. According to the GitHub advisory (GHSA-3237-pr3f-cm2g), any computer with 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 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 initial compromise, as the attacker may have gained full control of the system.\n\nThis represents a critical supply chain attack through a compromised npm package with potential for widespread impact across any projects or systems that depend on fastify-addon.
Indicators of compromise
- Packages
- fastify-addon
Remediation
- Immediately remove the fastify-addon package from all systems
- Rotate all secrets, API keys, and credentials from a clean, uncompromised computer
- Perform a full security audit and malware scan of any system that had fastify-addon installed
- Review system logs for unauthorized access or suspicious activity during the period the package was installed
- Consider the affected system(s) potentially compromised and plan for full rebuild if critical infrastructure
- Check for any unauthorized changes to system files, configurations, or other installed packages
Sources
- GitHub Advisory GHSA-3237-pr3f-cm2g · GitHub Advisory Database
Cite this entry
"Malware in fastify-addon." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 15, 2026; last updated July 15, 2026. https://supplychainattack.org/incident/malware-in-fastify-addon-1i2dlg
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