Malware in upjsma
The npm package upjsma was found to contain malware, resulting in full system compromise of any computer with the package installed or running. All secrets and keys on affected systems should be rotated immediately from a different computer.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- upjsma
The npm package upjsma was identified as containing malware. According to the GitHub Advisory (GHSA-9g67-fm87-8p6v), 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 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 package installation, given the potential for full system compromise.\n\nAffected users should treat their systems as potentially fully compromised and take appropriate incident response measures.
Indicators of compromise
- Packages
- upjsma
Remediation
- Remove the upjsma package immediately
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Assume full system compromise and perform comprehensive security audit
- Consider rebuilding affected systems from clean media if critical infrastructure
- Monitor for signs of persistent malware or unauthorized access
Sources
- GitHub Advisory GHSA-9g67-fm87-8p6v · GitHub Advisory Database
Cite this entry
"Malware in upjsma." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 20, 2026; last updated July 20, 2026. https://supplychainattack.org/incident/malware-in-upjsma-1cjorx
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