Malware in @multformats/multiaddr
Malware was discovered in the npm package @multformats/multiaddr. Systems with this 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
- @multformats/multiaddr
A critical malware incident was identified in the npm package @multformats/multiaddr. According to the GitHub Security Advisory (GHSA-92ch-4pr4-pmgj), 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\nThis represents a critical supply chain compromise affecting npm ecosystem users who depend on this package.
Indicators of compromise
- Packages
- @multformats/multiaddr
Remediation
- Immediately isolate any computer with @multformats/multiaddr installed from the network
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the @multformats/multiaddr package from all affected systems
- Perform a full security audit and malware scan of affected systems
- Review system logs and access logs for signs of unauthorized activity during the period the package was installed
- Consider full system reimaging if the package was installed on critical infrastructure or systems handling sensitive data
Sources
- GitHub Advisory GHSA-92ch-4pr4-pmgj · GitHub Advisory Database
Cite this entry
"Malware in @multformats/multiaddr." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 29, 2026; last updated June 29, 2026. https://supplychainattack.org/incident/malware-in-multformats-multiaddr-qzgjd3
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