CVE-2025-67735

Publication date 16 December 2025

Last updated 26 August 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.5 · Medium

Score breakdown

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.

Status

Package Ubuntu Release Status
netty 26.04 LTS resolute
Not affected
25.10 questing Ignored end of life, was needs-triage
25.04 plucky Ignored end of life, was needs-triage
24.04 LTS noble
Fixed 1:4.1.48-9ubuntu0.2
22.04 LTS jammy
Fixed 1:4.1.48-4+deb11u2ubuntu0.2
20.04 LTS focal
Fixed 1:4.1.45-1ubuntu0.1~esm7
18.04 LTS bionic
Fixed 1:4.1.7-4ubuntu0.1+esm7
16.04 LTS xenial
Fixed 1:4.0.34-1ubuntu0.1~esm5
14.04 LTS trusty Ignored changes too intrusive

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Severity score breakdown

CVSS version: CVSS v3.0

Base score 6.5 · Medium

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

References

Related Ubuntu Security Notices (USN)

Other references

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