CVE-2025-67735 | THREATINT

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.

PUBLISHED Reserved 2025-12-11 | Published 2025-12-16 | Updated 2025-12-16 | Assigner GitHub_M

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem types

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

Product status

>= 4.2.0.Alpha1, < 4.2.8.Final

affected

< 4.1.129.Final

affected

References

github.com/.../netty/security/advisories/GHSA-84h7-rjj3-6jx4

cve.org (CVE-2025-67735)

nvd.nist.gov (CVE-2025-67735)

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