Malware in @gocortexio/npmgremlinbox-eupl-1-1
The npm package @gocortexio/npmgremlinbox-eupl-1-1 contained malware that provides full system compromise to attackers. All systems with this package installed 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
- @gocortexio/npmgremlinbox-eupl-1-1
A malicious npm package @gocortexio/npmgremlinbox-eupl-1-1 was published containing malware. Any computer with this package installed or running should be considered fully compromised, with potential for complete system takeover by an external entity.\n\nThe malware grants attackers full control of affected systems. All secrets, keys, and credentials stored on compromised machines must be rotated immediately from a different, unaffected computer. While the package can 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.\n\nThis incident was disclosed via GitHub Advisory GHSA-c537-6552-hchq on 2026-07-20.
Indicators of compromise
- Packages
- @gocortexio/npmgremlinbox-eupl-1-1
Remediation
- Immediately remove the @gocortexio/npmgremlinbox-eupl-1-1 package from all systems
- Rotate all secrets, API keys, credentials, and tokens from a different, unaffected 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 full system reimaging if compromise is suspected
- Monitor affected systems for persistence mechanisms or additional malware
Sources
- GitHub Advisory GHSA-c537-6552-hchq · GitHub Advisory Database
Cite this entry
"Malware in @gocortexio/npmgremlinbox-eupl-1-1." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 20, 2026; last updated July 20, 2026. https://supplychainattack.org/incident/malware-in-gocortexio-npmgremlinbox-eupl-1-1-1r3we3
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