The llhttp parser <v14.20.1, <v16.17.1 and <v18.9.1 in the http module in Node.js does not strictly use the CRLF sequence to delimit HTTP requests. This can lead to HTTP Request Smuggling (HRS). A vulnerability was found in NodeJS due to the llhttp parser in the http module not strictly using the CRLF sequence to delimit HTTP requests. This issue can lead to HTTP Request Smuggling (HRS). This flaw allows an attacker to send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers, causing web cache poisoning, and conducting XSS attacks.
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