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Vulnerabilities

CVE-2025-67735 | BDVDB-2026-306244 Detail

nettynetty

Description#

Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.129.Final and 4.2.8.Final, the `io.netty.handler.codec.http.HttpRequestEncoder` has a CRLF injection with the request URI when constructing a request. This leads to request smuggling when `HttpRequestEncoder` is used without proper sanitization of the URI. Any application / framework using `HttpRequestEncoder` can be subject to be abused to perform request smuggling using CRLF injection. Versions 4.1.129.Final and 4.2.8.Final fix the issue.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

  • CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.