Malware in chai-web3-testkit
Malware was discovered in the npm package chai-web3-testkit. Systems with this package installed are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with chai-web3-testkit installed or running
- Ecosystems
- Attack vectors
- Affected entities
- chai-web3-testkit
The npm package chai-web3-testkit was found to contain malware. According to the GitHub advisory, 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 package in the npm ecosystem.
Indicators of compromise
- Packages
- chai-web3-testkit
Remediation
- Immediately isolate any system with chai-web3-testkit installed from the network
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the chai-web3-testkit 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 compromise is suspected to be complete
Sources
- GitHub Advisory GHSA-j8qr-4p5h-mwqj · GitHub Advisory Database
Cite this entry
"Malware in chai-web3-testkit." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 12, 2026; last updated June 12, 2026. https://supplychainattack.org/incident/malware-in-chai-web3-testkit-cufwru
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