Malware in base58-core
Malware was discovered in the npm package base58-core. Systems with the package installed or running are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- base58-corenpm package
The npm package base58-core was found to contain malware. According to the GitHub advisory (GHSA-3439-q8cv-mg5v), 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, there is no guarantee that removal will eliminate all malicious software that may have been installed as a result of the compromise.\n\nThis represents a critical supply chain attack through a compromised package in the npm ecosystem.
Indicators of compromise
- Packages
- base58-core
Remediation
- Immediately isolate any system that has base58-core installed or running
- Rotate all secrets, API keys, and cryptographic keys from a different, uncompromised computer
- Remove the base58-core package from all affected systems
- Perform a full security audit and malware scan on affected systems
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider the affected system(s) potentially fully compromised and plan for complete rebuild if critical infrastructure
Sources
- GitHub Advisory GHSA-3439-q8cv-mg5v · GitHub Advisory Database
Cite this entry
"Malware in base58-core." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 7, 2026; last updated July 7, 2026. https://supplychainattack.org/incident/malware-in-base58-core-8bafwv
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