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
Suggest a correction
Found an error or have a newer source? Corrections to factual errors take priority over new entries.
Related incidents
- resolvedcritical
Malicious code in @syncraft-labs/vue (npm)
The npm package @syncraft-labs/vue version 0.4.1 contained malicious obfuscated code in its ESM build that implements a blockchain-hosted C2 dropper (EtherHiding pattern), enabling remote code execution on any consumer importing the package.
npmCompromised package - resolvedcritical
Malicious code in @usaa-grp-personal-profile/personal-profile-common (npm)
Malicious package @usaa-grp-personal-profile/personal-profile-common version 999.0.0 published to public npm as a dependency-confusion attack targeting an organization's internal registry. The package contains preinstall and postinstall hooks that exfiltrate hostname, username, and working directory to an attacker-controlled OAST endpoint on every install.
npmDependency confusionCompromised package - activecritical
Malware in @sdgdfgdfhhhfd/multiviewr
Malware discovered in the npm package @sdgdfgdfhhhfd/multiviewr. Systems with this package installed are considered fully compromised and require immediate remediation.
npmCompromised package - containedcritical
Malicious code in 3-buildsight-web (npm)
The npm package 3-buildsight-web contains malicious code that fetches and executes arbitrary JavaScript from a remote Bitbucket URL on module load, granting full page privileges to an unverified third party.
npmCompromised package