A vulnerability was found in NodeJS due to the llhttp parser in the HTTP module incorrectly handling multi-line Transfer-Encoding headers. This issue can lead to HTTP Request Smuggling (HRS). This flaw allows a remote attacker to send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers, causing web cache poisoning, and conducting XSS attacks.

A vulnerability was found in NodeJS due to improper validation of HTTP requests. The llhttp parser in the http module does not correctly parse and validate Transfer-Encoding headers. This issue can lead to HTTP Request Smuggling (HRS), causing web cache poisoning, and conducting XSS attacks.