CVE-2025-67735 — Netty has a CRLF Injection vulnerability in io.netty.handler.codec.http.HttpRequestEncoder

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
netty / netty	affected >= 4.2.0.Alpha1, < 4.2.8.Final; affected < 4.1.129.Final

CWE

CWE-93

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.