CRLF Injection Vulnerability in Netty Network Application Framework
CVE-2025-67735

6.5MEDIUM

Key Information:

Vendor

Netty

Status
Netty
Vendor
CVE Published:
16 December 2025

What is CVE-2025-67735?

The Netty Network Application Framework is vulnerable to a CRLF injection caused by improper handling of request URIs in the HttpRequestEncoder component. This vulnerability, present in versions prior to 4.1.129.Final and 4.2.8.Final, allows attackers to exploit request smuggling techniques if the URI is not properly sanitized. Applications utilizing this framework may inadvertently become targets, thus necessitating an upgrade to the fixed versions to mitigate potential risks.

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Affected Version(s)

netty >= 4.2.0.Alpha1, < 4.2.8.Final < 4.2.0.Alpha1, 4.2.8.Final

netty < 4.1.129.Final < 4.1.129.Final

References

https://github.com/netty/netty/security/advisories/GHSA-8...
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CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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