#VU59234 Inconsistent interpretation of HTTP requests in llhttp

Published: 2022-01-05

Vulnerability identifier: #VU59234

Vulnerability risk: Medium


CVE-ID: CVE-2021-22960


Exploitation vector: Network

Exploit availability:

Vulnerable software:
Web applications / Modules and components for CMS

Vendor: Node.js Foundation


The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests, where the application ignores chunk extensions when parsing the body of chunked requests. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

Install updates from vendor's website.

Vulnerable software versions

llhttp: 6.0.0 - 6.0.5, 5.1.0, 5.0.0, 4.1.0 - 4.1.1, 4.0.0, 3.0.0 - 3.0.1, 2.2.0 - 2.2.1, 2.1.0 - 2.1.3, 2.0.0 - 2.0.5, 1.1.0 - 1.1.4, 1.0.1

Fixed software versions


External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

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