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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-58056 Detail

Description

Netty is an asynchronous event-driven network application framework for development of maintainable high performance protocol servers and clients. In versions 4.1.124.Final, and 4.2.0.Alpha3 through 4.2.4.Final, Netty incorrectly accepts standalone newline characters (LF) as a chunk-size line terminator, regardless of a preceding carriage return (CR), instead of requiring CRLF per HTTP/1.1 standards. When combined with reverse proxies that parse LF differently (treating it as part of the chunk extension), attackers can craft requests that the proxy sees as one request but Netty processes as two, enabling request smuggling attacks. This is fixed in versions 4.1.125.Final and 4.2.5.Final.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
CVSS-BT 2.9 LOW
Vector:  CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://datatracker.ietf.org/doc/html/rfc9112#name-chunked-transfer-coding GitHub, Inc.
https://github.com/JLLeitschuh/unCVEed/issues/1 GitHub, Inc.
https://github.com/netty/netty/commit/edb55fd8e0a3bcbd85881e423464f585183d1284 GitHub, Inc.
https://github.com/netty/netty/issues/15522 GitHub, Inc.
https://github.com/netty/netty/pull/15611 GitHub, Inc.
https://github.com/netty/netty/security/advisories/GHSA-fghv-69vj-qj49 GitHub, Inc.
https://w4ke.info/2025/06/18/funky-chunks.html GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') GitHub, Inc.  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-58056
NVD Published Date:
09/03/2025
NVD Last Modified:
09/05/2025
Source:
GitHub, Inc.