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Malware in eslint-jest

Malware discovered in the eslint-jest npm package. Systems with this package installed or running should be considered fully compromised. All secrets and keys must be rotated from a different computer.

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Disclosed
Last updated
Blast radius
Any system with eslint-jest installed or executed
Ecosystems
npm
Attack vectors
Compromised package
Affected entities
  • eslint-jestnpm package

The eslint-jest npm package has been identified as containing malware. According to the GitHub Advisory (GHSA-m3v6-5prj-x7rp), any computer with this package installed or running should be considered fully compromised.\n\nImmediate action is required: all secrets and keys stored on affected computers must be rotated from a different, uncompromised system. While the package should be removed, there is no guarantee that removal will eliminate all malicious software that may have been installed as a result of the compromise.\n\nThis represents a critical supply chain attack affecting the npm ecosystem, with potential for widespread impact given the package's likely use in development environments.

Indicators of compromise

Packages
  • eslint-jest

Remediation

  • Immediately rotate all secrets and keys from a different, uncompromised computer
  • Remove the eslint-jest package from all affected systems
  • Audit system logs for unauthorized access or activity during the period the package was installed
  • Scan affected systems for additional malware or persistence mechanisms
  • Review and revoke any credentials or tokens that may have been exposed
  • Consider full system reimaging if compromise is suspected

Sources

  1. GitHub Advisory GHSA-m3v6-5prj-x7rp · GitHub Advisory Database

Cite this entry

"Malware in eslint-jest." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 10, 2026; last updated July 10, 2026. https://supplychainattack.org/incident/malware-in-eslint-jest-181tf1

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