🛡️ CVE-2025-67735
🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-93 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity Medium
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE CWE-93
Public Exploit ✅ No
Source NVD
Published 2025-12-15
Updated 2026-06-15
Modified 2026-02-04
Fix URL N/A

Affected Packages

Software From version Fixed in
io.netty:netty-codec-http — 4.1.129.Final
netty 4.2.0 4.2.8

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