Malware in bs58-11
The npm package bs58-11 contained malware that could fully compromise any system where it was 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
- bs58-11
The npm package bs58-11 was found to contain malware. According to the GitHub advisory, any computer with 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, the advisory notes that full control of the computer may have been given to an outside entity, meaning removal of the package alone may not eliminate all malicious software that resulted from the installation.\n\nAffected users should treat their systems as potentially fully compromised and take appropriate incident response measures.
Indicators of compromise
- Packages
- bs58-11
Remediation
- Immediately rotate all secrets and keys stored on affected systems from a different, uncompromised computer
- Remove the bs58-11 package from all systems
- Conduct a full security audit and forensic analysis of any system that had bs58-11 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
- GitHub Advisory GHSA-mw39-7442-3p8m · GitHub Advisory Database
Cite this entry
"Malware in bs58-11." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed August 11, 2026; last updated August 11, 2026. https://supplychainattack.org/incident/malware-in-bs58-11-nlr9u6
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