Malware in optional-cpu-features
Malware was discovered in the npm package optional-cpu-features. Systems with this package installed are 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
- optional-cpu-features
The npm package optional-cpu-features was found to contain malware. According to the GitHub Advisory (GHSA-pwmh-97g7-2r34), 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 compromise.\n\nThis represents a critical supply chain attack through a compromised package in the npm ecosystem.
Indicators of compromise
- Packages
- optional-cpu-features
Remediation
- Immediately remove the optional-cpu-features package from all affected systems
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Perform a full security audit and malware scan of any system that had this package installed
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider the affected system(s) potentially compromised and plan for full rebuild if critical systems are involved
Sources
- GitHub Advisory GHSA-pwmh-97g7-2r34 · GitHub Advisory Database
Cite this entry
"Malware in optional-cpu-features." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 15, 2026; last updated June 16, 2026. https://supplychainattack.org/incident/malware-in-optional-cpu-features-0eqyxo
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