Malware in @gocortexio/npmgremlinbox-osl-3-0
The npm package @gocortexio/npmgremlinbox-osl-3-0 contained malware that provided full system compromise to attackers. Systems with this package installed should be considered fully compromised and all secrets and keys rotated immediately.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- @gocortexio/npmgremlinbox-osl-3-0
A malicious npm package @gocortexio/npmgremlinbox-osl-3-0 was published to the npm registry containing malware. The package provided attackers with full control of any system on which it was installed or executed.\n\nAccording to the GitHub Security Advisory, any computer with 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, uncompromised computer.\n\nWhile the package should be removed, the advisory notes that full control of the computer may have been given to an outside entity, meaning there is no guarantee that removing the package alone will remove all malicious software resulting from the installation.\n\nThe incident was disclosed on 2026-07-20 via GitHub Security Advisory GHSA-p5pm-xhx8-3gq6.
Indicators of compromise
- Packages
- @gocortexio/npmgremlinbox-osl-3-0
Remediation
- Immediately remove the @gocortexio/npmgremlinbox-osl-3-0 package from all systems
- Rotate all secrets, API keys, credentials, and authentication tokens from a clean, 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) as potentially fully compromised and plan for complete rebuild if critical systems are involved
- Notify relevant stakeholders and security teams of potential compromise
Sources
- GitHub Advisory GHSA-p5pm-xhx8-3gq6 · GitHub Advisory Database
Cite this entry
"Malware in @gocortexio/npmgremlinbox-osl-3-0." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 20, 2026; last updated July 20, 2026. https://supplychainattack.org/incident/malware-in-gocortexio-npmgremlinbox-osl-3-0-smnvci
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