Malware in cmp-api-stub
Malware was discovered in the npm package cmp-api-stub. Systems with this package installed or running should be considered fully compromised, requiring immediate rotation of all secrets and keys from a different computer.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- cmp-api-stub
A malware-laden version of the npm package cmp-api-stub was published and made available to users. The package grants full control of affected systems to an outside entity.\n\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on affected systems should be rotated immediately from a different, unaffected computer.\n\nWhile the package should be removed, complete removal of all malicious software resulting from the installation cannot be guaranteed, as the attacker may have established persistent access to the system.\n\nThis incident was disclosed via GitHub Advisory GHSA-q9xg-g7r9-mqrx on 2026-06-29.
Indicators of compromise
- Packages
- cmp-api-stub
Remediation
- Immediately remove the cmp-api-stub package from all systems
- Rotate all secrets, API keys, and credentials from a different, unaffected computer
- Perform a full security audit and malware scan of any system that had the package installed
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical infrastructure
Sources
- GitHub Advisory GHSA-q9xg-g7r9-mqrx · GitHub Advisory Database
Cite this entry
"Malware in cmp-api-stub." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 29, 2026; last updated June 29, 2026. https://supplychainattack.org/incident/malware-in-cmp-api-stub-1kw9c2
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