#VU124422 Inconsistent interpretation of HTTP requests in Netty - CVE-2026-33870

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Main Vulnerability Database Vulnerabilities #VU124422

#VU124422 Inconsistent interpretation of HTTP requests in Netty - CVE-2026-33870

Published: March 25, 2026


Vulnerability identifier: #VU124422
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2026-33870
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability: Public exploit is available
Vulnerable software:
Netty
Software vendor:
Netty project

Description

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

The vulnerability exists due to improper validation of HTTP requests within chunked transfer encoding extension values. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.


Remediation

Install updates from vendor's website.

External links