Malware in bs58-86
The npm package bs58-86 was compromised and distributed with malware. Systems with the package installed are considered fully compromised and require immediate remediation including secret rotation and package removal.
- Disclosed
- Last updated
- Blast radius
- Any system with the malicious package installed
- Ecosystems
- Attack vectors
- Affected entities
- bs58-86npm package containing malware
The npm package bs58-86 was found to contain malware. According to the GitHub Advisory (GHSA-9gvv-wfph-q6rj), 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 malicious 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 compromise.\n\nThis represents a critical supply chain attack through package distribution, affecting all users who installed the compromised version of bs58-86.
Indicators of compromise
- Packages
- bs58-86
Remediation
- Immediately rotate all secrets and keys from a different, uncompromised computer
- Remove the bs58-86 package from all affected systems
- Audit system logs for signs of unauthorized access or data exfiltration
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical systems are involved
- Check for any other suspicious packages or modifications on affected systems
Sources
- GitHub Advisory GHSA-9gvv-wfph-q6rj · GitHub Advisory Database
Cite this entry
"Malware in bs58-86." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 10, 2026; last updated July 10, 2026. https://supplychainattack.org/incident/malware-in-bs58-86-aus63v
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