Malware in jsontoken-extend
Malware was discovered in the npm package jsontoken-extend. Systems with this package installed should be considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with jsontoken-extend installed; full system compromise possible
- Ecosystems
- Attack vectors
- Affected entities
- jsontoken-extendnpm package
The npm package jsontoken-extend was found to contain malware. According to the GitHub advisory (GHSA-v985-2jx7-c35g), 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\nThe incident was published on 2026-07-06 via the GitHub advisory system."
Indicators of compromise
- Packages
- jsontoken-extend
Remediation
- Immediately remove the jsontoken-extend package from all affected systems
- Rotate all secrets, API keys, and credentials stored on affected computers from a different, uncompromised system
- Perform a full security audit and malware scan of any system that had this package installed
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical infrastructure
Sources
- GitHub Advisory GHSA-v985-2jx7-c35g · GitHub Advisory Database
Cite this entry
"Malware in jsontoken-extend." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 6, 2026; last updated July 6, 2026. https://supplychainattack.org/incident/malware-in-jsontoken-extend-usdl02
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