Malware in arc-diag-util
The npm package arc-diag-util was found to contain malware, resulting in full system compromise of any computer with the package installed or running. All secrets and keys should be rotated immediately from a different machine, and the package should be removed.
- Disclosed
- Last updated
- Blast radius
- Any system with arc-diag-util installed or executed
- Ecosystems
- Attack vectors
- Affected entities
- arc-diag-util
The npm package arc-diag-util was identified as containing malware. According to the GitHub Advisory (GHSA-wx2g-gmxq-vvqv), 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, uncompromised computer. While the package should be removed, the advisory notes that because full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from the installation.\n\nThis is a critical supply chain incident affecting the npm ecosystem.
Indicators of compromise
- Packages
- arc-diag-util
Remediation
- Immediately rotate all secrets and keys from a different, uncompromised computer
- Remove the arc-diag-util package from all affected systems
- Conduct a full security audit of any system that had arc-diag-util installed
- Consider the affected system(s) as potentially fully compromised and take appropriate incident response measures
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
Sources
- GitHub Advisory GHSA-wx2g-gmxq-vvqv · GitHub Advisory Database
Cite this entry
"Malware in arc-diag-util." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed August 17, 2026; last updated August 17, 2026. https://supplychainattack.org/incident/malware-in-arc-diag-util-f3c5yb
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