Malware in @gocortexio/npmgremlinbox-unlicense
The npm package @gocortexio/npmgremlinbox-unlicense contained malware that provided full system compromise to attackers. Systems with this package installed should be considered fully compromised and all credentials rotated from a clean machine.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed
- Ecosystems
- Attack vectors
- Affected entities
- @gocortexio/npmgremlinbox-unlicense
The npm package @gocortexio/npmgremlinbox-unlicense was found to contain malware. According to the GitHub advisory, any computer with this package installed or running should be considered fully compromised.\n\nThe malware grants outside entities full control of affected systems. All secrets and keys stored on compromised computers should be rotated immediately from a different, unaffected machine.\n\nWhile 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 the level of system access the malware obtained.\n\nThis incident was disclosed on 2026-07-20 via GitHub Security Advisory GHSA-ghmj-68m9-xmgq.
Indicators of compromise
- Packages
- @gocortexio/npmgremlinbox-unlicense
Remediation
- Immediately remove the @gocortexio/npmgremlinbox-unlicense package from all systems
- Rotate all secrets, API keys, credentials, and authentication tokens from a clean, unaffected machine
- Assume full system compromise and conduct forensic analysis or rebuild affected systems from known-good media
- Audit all access logs and activity on affected systems for signs of unauthorized access or data exfiltration
- Monitor for any lateral movement or secondary compromises originating from affected systems
Sources
- GitHub Advisory GHSA-ghmj-68m9-xmgq · GitHub Advisory Database
Cite this entry
"Malware in @gocortexio/npmgremlinbox-unlicense." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 20, 2026; last updated July 20, 2026. https://supplychainattack.org/incident/malware-in-gocortexio-npmgremlinbox-unlicense-cfhm3a
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