Description
The forwarded module is used by the Express.js framework to handle the X-Forwarded-For header. It is vulnerable to a regular expression denial of service when it's passed specially crafted input to parse. This causes the event loop to be blocked causing a denial of service condition.
Remediation
References
http://www.securityfocus.com/bid/104427
https://nodesecurity.io/advisories/527
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