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Malware in typescript-base58

Malware was discovered in the npm package typescript-base58. Systems with this package installed are considered fully compromised and require immediate remediation.

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Disclosed
Last updated
Blast radius
Any system with the package installed or running
Ecosystems
npm
Attack vectors
Compromised package
Affected entities
  • typescript-base58npm package

The npm package typescript-base58 was found to contain malware. According to the GitHub Advisory (GHSA-rff8-755c-wqvw), 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 npm package with potential for complete system compromise.

Indicators of compromise

Packages
  • typescript-base58

Remediation

  • Immediately isolate any system with typescript-base58 installed from the network
  • Rotate all secrets, API keys, and credentials from a different, uncompromised computer
  • Remove the typescript-base58 package from all affected systems
  • Conduct a full forensic analysis of affected systems to identify any additional malicious software
  • Review all access logs and audit trails for systems that had the package installed
  • Consider the affected systems as potentially fully compromised and plan for complete rebuild if critical systems are involved

Sources

  1. GitHub Advisory GHSA-rff8-755c-wqvw · GitHub Advisory Database

Cite this entry

"Malware in typescript-base58." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 7, 2026; last updated July 7, 2026. https://supplychainattack.org/incident/malware-in-typescript-base58-1kiujb

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