Malware in @gocortexio/npmgremlinbox-sendmail-8-23
Malware discovered in npm package @gocortexio/npmgremlinbox-sendmail-8-23. 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
- @gocortexio/npmgremlinbox-sendmail-8-23
A malicious npm package @gocortexio/npmgremlinbox-sendmail-8-23 was identified and published on GitHub's advisory database (GHSA-9x3r-xqjc-rf4m). The package contains malware that grants full control of affected systems to an outside entity.\n\nAny computer with this package installed or running should be considered fully compromised. The advisory recommends immediate rotation of all secrets and keys from a different, unaffected computer. While the package should be removed, complete removal of all malicious software cannot be guaranteed due to the level of system compromise.\n\nThe incident was disclosed on 2026-07-20 via GitHub's security advisory system.
Indicators of compromise
- Packages
- @gocortexio/npmgremlinbox-sendmail-8-23
Remediation
- Immediately identify all systems with @gocortexio/npmgremlinbox-sendmail-8-23 installed
- Rotate all secrets, API keys, and credentials from a different, unaffected computer
- Remove the package from all affected systems
- Perform forensic analysis to identify any additional malicious software installed
- Monitor affected systems for signs of unauthorized access or data exfiltration
- Consider full system reimaging if compromise is confirmed
Sources
- GitHub Advisory GHSA-9x3r-xqjc-rf4m · GitHub Advisory Database
Cite this entry
"Malware in @gocortexio/npmgremlinbox-sendmail-8-23." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 20, 2026; last updated July 20, 2026. https://supplychainattack.org/incident/malware-in-gocortexio-npmgremlinbox-sendmail-8-23-twjgkg
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