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Malware in chai-as-uphelded

The npm package chai-as-uphelded was found to contain malware. Any computer with this package installed or running should be considered fully compromised, with all secrets and keys requiring immediate rotation from a different system.

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Disclosed
Last updated
Blast radius
Any system with the package installed or running
Ecosystems
Attack vectors
Affected entities
  • chai-as-uphelded

The npm package chai-as-uphelded was identified as containing malware. According to the GitHub advisory, 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 malicious package should be removed, the advisory notes that full control of the computer may have been given to an outside entity, meaning there is no guarantee that removing the package alone will remove all malicious software resulting from the installation.\n\nAffected users should treat their systems as potentially fully compromised and take appropriate incident response measures.

Indicators of compromise

Packages
  • chai-as-uphelded

Remediation

  • Immediately rotate all secrets and keys from a different, uncompromised computer
  • Remove the chai-as-uphelded package from all affected systems
  • Conduct a full security audit and forensic analysis of any system that had this package installed
  • Monitor affected systems for signs of unauthorized access or persistence mechanisms
  • Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical systems are involved

Sources

  1. GitHub Advisory GHSA-9gg4-phm5-h5g9 · GitHub Advisory Database

Cite this entry

"Malware in chai-as-uphelded." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 23, 2026; last updated June 23, 2026. https://supplychainattack.org/incident/malware-in-chai-as-uphelded-80nkn5

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