Malware in ethersss
The npm package ethersss was found to contain malware, fully compromising any system 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
- ethersssnpm package containing malware
The npm package ethersss was identified as containing malware. According to the GitHub Advisory (GHSA-h2m8-726m-9cxp), any computer with this package installed or running should be considered fully compromised.\n\nAffected systems require immediate remediation. All secrets and cryptographic keys stored on compromised computers must be rotated from a different, unaffected system. While the malicious package should be removed, complete removal of all malicious software cannot be guaranteed due to the potential for full system compromise.\n\nThe advisory was published on 2026-07-30 via the GitHub Advisory Database.
Indicators of compromise
- Packages
- ethersss
Remediation
- Immediately remove the ethersss package from all systems
- Rotate all secrets, API keys, and cryptographic keys from a different, unaffected computer
- Assume full system compromise and conduct forensic analysis
- Review system logs for unauthorized access or activity
- Consider full system rebuild if the package was installed on production or sensitive systems
Sources
- GitHub Advisory GHSA-h2m8-726m-9cxp · GitHub Advisory Database
Cite this entry
"Malware in ethersss." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 30, 2026; last updated July 30, 2026. https://supplychainattack.org/incident/malware-in-ethersss-1k6sn4
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