Malware in cookie-parser-legacy
Malware was discovered in the npm package cookie-parser-legacy. Systems with this 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 package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- cookie-parser-legacynpm package containing malware
The npm package cookie-parser-legacy was found to contain malware. According to the GitHub Advisory (GHSA-xv3p-wcmf-6hp8), 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 malicious 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.\n\nThis represents a critical supply chain attack through a compromised npm package with potential for complete system compromise.
Indicators of compromise
- Packages
- cookie-parser-legacy
Remediation
- Immediately isolate any system with cookie-parser-legacy installed from the network
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the cookie-parser-legacy package from all affected systems
- Conduct a full security audit and malware scan of affected systems
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider the affected systems as potentially fully compromised and plan for complete rebuild if critical systems are involved
Sources
- GitHub Advisory GHSA-xv3p-wcmf-6hp8 · GitHub Advisory Database
Cite this entry
"Malware in cookie-parser-legacy." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 9, 2026; last updated June 9, 2026. https://supplychainattack.org/incident/malware-in-cookie-parser-legacy-pfpurb
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