Malware in sjs-builders
The npm package sjs-builders 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 computer.
- Disclosed
- Last updated
- Blast radius
- Any system with sjs-builders installed or running
- Ecosystems
- Attack vectors
- Affected entities
- sjs-buildersnpm package containing malware
The npm package sjs-builders was identified as containing malware. According to the GitHub Advisory (GHSA-55q4-68jc-wrgw), 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 package installation, given that full control of the computer may have been given to an outside entity.\n\nThe advisory was published on 2026-07-06 via GitHub's security advisory system.
Indicators of compromise
- Packages
- sjs-builders
Remediation
- Immediately rotate all secrets and keys from a different, uncompromised computer
- Remove the sjs-builders package from all affected systems
- Assume full system compromise and conduct forensic analysis
- Audit all activity on affected systems during the period the package was installed
- Consider rebuilding affected systems from clean media if critical infrastructure or highly sensitive data is involved
Sources
- GitHub Advisory GHSA-55q4-68jc-wrgw · GitHub Advisory Database
Cite this entry
"Malware in sjs-builders." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 6, 2026; last updated July 6, 2026. https://supplychainattack.org/incident/malware-in-sjs-builders-1t66wg
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