Malware in thirdwebjs
The npm package thirdwebjs was compromised and distributed with malware. Systems with the package installed are considered fully compromised and require immediate remediation including secret rotation and package removal.
- Disclosed
- Last updated
- Blast radius
- Any system with the malicious package installed
- Ecosystems
- Attack vectors
- Affected entities
- thirdwebjsnpm package containing malware
The npm package thirdwebjs 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. The malicious package should be removed, though complete removal of all malicious software cannot be guaranteed due to the potential for full system compromise.\n\nThis represents a critical supply chain attack through a compromised npm package with broad potential impact on any developer or system that installed or executed the affected code.
Indicators of compromise
- Packages
- thirdwebjs
Remediation
- Immediately rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the thirdwebjs package from all affected systems
- Audit system logs for unauthorized access or activity during the period the package was installed
- Perform a full security assessment of any system that had the package installed
- Consider the affected system(s) potentially compromised and plan for full rebuild if critical systems are involved
- Check npm audit logs and package.json files across your organization to identify all installations
Sources
- GitHub Advisory GHSA-8jr3-m3cj-m436 · GitHub Advisory Database
Cite this entry
"Malware in thirdwebjs." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 27, 2026; last updated July 27, 2026. https://supplychainattack.org/incident/malware-in-thirdwebjs-1m32fs
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