CVE-2026-50020

Netty (network framework) contains a flaw in HttpObjectDecoder: prior to reading the first request-line, it ignores all ISO control bytes (0x00–0x1F, 0x7F) plus whitespace, beyond what RFC 9112 allows. This can cause request-boundary confusion in pipelined or multiplexed transports. Affects Netty...

CVE-2026-50020 Netty's HttpObjectDecoder skips arbitrary initial control characters when only initial CRLF characters are permitted

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, before reading the first request-line, HttpObjectDecoder skips every byte for which Character.isISOControlb is true 0x00–0x1F and 0x7F as well as all...

CVE-2026-50020 Netty's HttpObjectDecoder skips arbitrary initial control characters when only initial CRLF characters are permitted

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, before reading the first request-line, HttpObjectDecoder skips every byte for which Character.isISOControlb is true 0x00–0x1F and 0x7F as well as all...

PT-2026-48904

Name of the Vulnerable Software and Affected Versions Netty versions prior to 4.1.135.Final Netty versions prior to 4.2.15.Final Description Before reading the first request-line, the HttpObjectDecoder function silently skips all whitespace and every byte for which Character.isISOControlb is true...

CVE-2026-42581

A flaw was found in Netty's HttpObjectDecoder. A remote attacker can exploit this by sending a specially crafted HTTP/1.0 request that includes both Transfer-Encoding: chunked and Content-Length headers. While Netty correctly strips the conflicting Content-Length header for HTTP/1.1 messages, thi...

CVE-2026-42581 Netty: HTTP/1.0 TE+CL Coexistence Bypasses Smuggling Sanitization

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 absen...

Netty 环境问题漏洞

Netty is a non-blocking I/O client-server framework developed by the Netty community. It is primarily used for developing Java network applications, such as protocol servers and clients. Versions of Netty prior to 4.2.13.Final and 4.1.133.Final contained environmental issues. These issues stemmed...

Unity Linux 20.1070e Security Update: netty (UTSA-2026-017789)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-017789 advisory. HttpObjectDecoder.java in Netty before 4.1.44 allows a Content-Length header to be accompanied by a second Content-Length header, or by a Transfer-Encoding header...

PT-2026-38374

Name of the Vulnerable Software and Affected Versions Netty versions prior to 4.1.133.Final Netty versions prior to 4.2.13.Final Description In the HttpObjectDecoder component, the software fails to strip the Content-Length header when an HTTP/1.0 request contains both Transfer-Encoding: chunked...

netty: HTTP request smuggling

A HTTP smuggling flaw was found in HttpObjectDecoder.java in Netty in versions prior to version 4.1.44. HTTP headers with an invalid fold, in this case CRLF carriage return, line feed without being followed by SP space or HTAB horizontal tab, result in situations where headers can be misread. Dat...

netty: HTTP request smuggling

A HTTP smuggling flaw was found in HttpObjectDecoder.java in Netty in versions prior to version 4.1.44. HTTP headers with an invalid fold, in this case CRLF carriage return, line feed without being followed by SP space or HTAB horizontal tab, result in situations where headers can be misread. Dat...