Malware in express-wrapper
Malware was discovered in the npm package express-wrapper. The package grants full system compromise to attackers and should be considered a critical threat to any system where it is installed or running.
- Disclosed
- Last updated
- Blast radius
- Any system with express-wrapper installed or running
- Ecosystems
- Attack vectors
- Affected entities
- express-wrappernpm package
A malware incident was identified in the npm package express-wrapper, published as GitHub Advisory GHSA-vm63-359p-h56j on July 30, 2026.\n\nThe advisory indicates that any computer with this package installed or running should be considered fully compromised. The malware provides attackers with complete control over affected systems.\n\nImmediate remediation requires rotating all secrets and keys from a different, uncompromised computer, and removing the package. However, due to the full system access granted by the malware, removal of the package alone may not eliminate all malicious software that was installed as a result.\n\nThis represents a critical supply chain attack through a compromised npm package with severe impact on all systems where it was deployed.
Indicators of compromise
- Packages
- express-wrapper
Remediation
- Immediately rotate all secrets, keys, and credentials from a different, uncompromised computer
- Remove the express-wrapper package from all affected systems
- Conduct a full forensic analysis of any system that had express-wrapper installed to identify additional malware or persistence mechanisms
- 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-vm63-359p-h56j · GitHub Advisory Database
Cite this entry
"Malware in express-wrapper." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 30, 2026; last updated July 30, 2026. https://supplychainattack.org/incident/malware-in-express-wrapper-6kf6f7
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