Malware in assertion-utils-js
Malware was discovered in the npm package assertion-utils-js. Systems with this package installed or running should be considered fully compromised, requiring immediate rotation of all secrets and keys from a different computer.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- assertion-utils-js
The npm package assertion-utils-js was found to contain malware. According to the GitHub advisory, any computer that has this package installed or running should be considered fully compromised.\n\nImmediate action is required: all secrets and keys stored on affected computers should be rotated immediately from a different, uncompromised computer. 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\nThe advisory was published on 2026-07-14 via GitHub's security advisory system.
Indicators of compromise
- Packages
- assertion-utils-js
Remediation
- Immediately rotate all secrets and keys from a different, uncompromised computer
- Remove the assertion-utils-js package from all affected systems
- Audit system logs for unauthorized access or activity
- Consider the affected computer fully compromised and perform a complete security review
- Scan systems for additional malware that may have been installed
Sources
- GitHub Advisory GHSA-q727-8h63-fm25 · GitHub Advisory Database
Cite this entry
"Malware in assertion-utils-js." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 14, 2026; last updated July 15, 2026. https://supplychainattack.org/incident/malware-in-assertion-utils-js-9ym13j
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