Malware in json-bigint-extend
Malware discovered in the npm package json-bigint-extend. Systems with this package installed are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed
- Ecosystems
- Attack vectors
- Affected entities
- json-bigint-extend
The npm package json-bigint-extend has been identified as containing malware. According to the GitHub Advisory (GHSA-h8r4-9vf9-jp96), any computer with this package installed or running should be considered fully compromised.\n\nThe advisory indicates that all secrets and keys stored on affected computers should 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
- json-bigint-extend
Remediation
- Immediately isolate any system with json-bigint-extend installed from the network
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the json-bigint-extend package from all affected systems
- Perform a full security audit and malware scan on all affected systems
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider full system reimaging if the system handles sensitive data or credentials
Sources
- GitHub Advisory GHSA-h8r4-9vf9-jp96 · GitHub Advisory Database
Cite this entry
"Malware in json-bigint-extend." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 14, 2026; last updated July 14, 2026. https://supplychainattack.org/incident/malware-in-json-bigint-extend-11jwqi
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