Malware in execfences
The npm package execfences was found to contain malware, resulting in full system compromise of any computer with the package installed or running. All affected systems should be considered fully compromised and all secrets and keys rotated from a different computer.
- Disclosed
- Last updated
- Blast radius
- Any system with execfences installed or running
- Ecosystems
- Attack vectors
- Affected entities
- execfencesnpm package containing malware
The npm package execfences was identified as containing malware. According to the GitHub Advisory (GHSA-34gj-pgfv-8qgf), any computer that has 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, unaffected computer. 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 initial compromise, given that the attacker may have gained full control of the system.\n\nThis represents a critical supply chain attack through a compromised npm package with potential for widespread impact across all systems where execfences was installed.
Indicators of compromise
- Packages
- execfences
Remediation
- Immediately isolate any computer with execfences installed from the network
- Rotate all secrets, API keys, and credentials from a different, unaffected computer
- Remove the execfences package from all affected systems
- Perform a full security audit and malware scan on affected systems
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider full system reimaging if the compromise is suspected to be deep or persistent
Sources
- GitHub Advisory GHSA-34gj-pgfv-8qgf · GitHub Advisory Database
Cite this entry
"Malware in execfences." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 10, 2026; last updated July 10, 2026. https://supplychainattack.org/incident/malware-in-execfences-ko5jvg
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