Malware in worker-build
Malware was discovered in the npm package worker-build, resulting in full system compromise for any computer with the package installed or running. The advisory recommends immediate removal and rotation of all secrets and keys from a clean system.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- worker-build
A critical malware incident was identified in the npm package worker-build. According to the GitHub Security Advisory (GHSA-7wpx-89q3-rcf4), any system with this package installed or running should be considered fully compromised.\n\nThe advisory indicates that the malware grants outside entities full control of affected systems. All secrets, keys, and credentials stored on compromised machines should be rotated immediately from a different, unaffected computer.\n\nWhile removing the package is recommended, the advisory notes that full system compromise may mean removing the package alone will not eliminate all malicious software that may have been installed as a result of the initial compromise.
Indicators of compromise
- Packages
- worker-build
Remediation
- Remove the worker-build package immediately
- Rotate all secrets, keys, and credentials from a clean, unaffected computer
- Perform a full security audit and malware scan of any system that had the package installed
- Review system logs and access logs for any unauthorized activity during the period the package was installed
- Consider the affected system(s) as potentially fully compromised and take appropriate incident response measures
Sources
- GitHub Advisory GHSA-7wpx-89q3-rcf4 · GitHub Advisory Database
Cite this entry
"Malware in worker-build." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 16, 2026; last updated June 16, 2026. https://supplychainattack.org/incident/malware-in-worker-build-r9b91n
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