CVE Watch15 jul 2026

CVE-2026-42581

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpObjectDecoder strips a co

CVSS

5.8

Medio

EPSS

0.6%

p45

KEV

—

Exploit Today

0-100

Publicado: 13 may 2026 · Última mod.: 15 jul 2026 · CWE-444

EPSS · 30d

0.5%EPSS · 30 días0.6%

2026-06-302026-07-17

Descripción técnica

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpObjectDecoder strips a conflicting Content-Length header when a request carries both Transfer-Encoding: chunked and Content-Length, but only for HTTP/1.1 messages. The guard is absent for HTTP/1.0. An attacker that sends an HTTP/1.0 request with both headers causes Netty to decode the body as chunked while leaving Content-Length intact in the forwarded HttpMessage. Any downstream proxy or handler that trusts Content-Length over Transfer-Encoding will disagree on message boundaries, enabling request smuggling. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.

Referencias oficiales

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