Malware in eslint-helper-1
Malware was discovered in the npm package eslint-helper-1, resulting in full system compromise for any computer with the package installed or running. All secrets and keys on affected systems should be rotated immediately from a different computer.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- eslint-helper-1
The npm package eslint-helper-1 was found to contain malware. According to the GitHub Advisory (GHSA-35c7-535m-jhv6), any computer that has this package installed or running should be considered fully compromised.\n\nThe advisory recommends that all secrets and keys stored on affected computers be rotated immediately from a different computer. While the package should be removed, there is no guarantee that removing it will eliminate all malicious software that may have been installed as a result of the initial compromise, given that the outside entity may have gained full control of the system.\n\nAffected users should treat their systems as potentially fully compromised and take appropriate incident response measures.
Indicators of compromise
- Packages
- eslint-helper-1
Remediation
- Immediately remove the eslint-helper-1 package from all systems
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Conduct a full security audit and forensic analysis of any system that had the package installed
- Monitor affected systems for signs of persistent malware or unauthorized access
- Consider rebuilding affected systems from clean media if full compromise is suspected
Sources
- GitHub Advisory GHSA-35c7-535m-jhv6 · GitHub Advisory Database
Cite this entry
"Malware in eslint-helper-1." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 23, 2026; last updated June 23, 2026. https://supplychainattack.org/incident/malware-in-eslint-helper-1-1xvfd5
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