Regular Expression Denial of Service (ReDoS) Vulnerability in Express.js Forwarded Module

CVE-2017-16118 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:N/A:P

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.

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