Malware in serverless-leo
Malware was discovered in the npm package serverless-leo. Systems with this package installed or running should be considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- serverless-leonpm package containing malware
The npm package serverless-leo was found to contain malware. According to the GitHub Advisory (GHSA-5cg2-34x6-pjgv), any computer with this package installed or running should be considered fully compromised.\n\nImmediate action is required to rotate all secrets and keys stored on affected systems 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\nThis is a critical supply chain incident affecting the npm ecosystem, with the potential to compromise any developer or system that installed or executed this package.
Indicators of compromise
- Packages
- serverless-leo
Remediation
- Immediately rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the serverless-leo package from all affected systems
- Conduct a full security audit of any system that had this package installed
- Review system logs and access patterns for signs of unauthorized activity
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical systems are involved
- Notify any downstream systems or services that may have been accessed from the compromised system
Sources
- GitHub Advisory GHSA-5cg2-34x6-pjgv · GitHub Advisory Database
Cite this entry
"Malware in serverless-leo." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 25, 2026; last updated June 29, 2026. https://supplychainattack.org/incident/malware-in-serverless-leo-12m4ny
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