Malware in multer-express
Malware was discovered in the npm package multer-express. Systems with this package installed or running are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with multer-express installed or running is considered fully compromised.
- Ecosystems
- Attack vectors
- Affected entities
- multer-express
A malware incident was identified in the npm package multer-express, as documented in GitHub Advisory GHSA-vvr6-9g6q-v5w3. The advisory indicates that any computer with this package installed or running should be considered fully compromised.\n\nThe advisory recommends immediate rotation of all secrets and keys from a different, uncompromised computer. While the package should be removed, the advisory notes that full control of the affected computer may have been granted to an outside entity, meaning removal of the package alone may not eliminate all malicious software introduced by the installation.\n\nThis represents a critical supply chain compromise affecting npm users who have installed or are running multer-express.
Indicators of compromise
- Packages
- multer-express
Remediation
- Immediately rotate all secrets, keys, and credentials from a different, uncompromised computer
- Remove the multer-express package from all affected systems
- Conduct a full security audit and forensic analysis of any system that had multer-express installed
- Monitor affected systems for signs of unauthorized access or persistence mechanisms
- Review and revoke any credentials or API keys that may have been exposed
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical infrastructure
Sources
- GitHub Advisory GHSA-vvr6-9g6q-v5w3 · GitHub Advisory Database
Cite this entry
"Malware in multer-express." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 24, 2026; last updated June 24, 2026. https://supplychainattack.org/incident/malware-in-multer-express-cjkhi5
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