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Vulnerability details

2.9/10
CVSS 4.0
CVE-2025-58056
resolved Published 2025-09-03 Updated 2026-10-19
NVD MITRE OpenCVE
Vulnerability Data from Dependency-Track
Affected versions
Scores
2.9 CVSS 4.0 NVD 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 displayed
7.5 CVSS 3.1 NVD CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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.
Same vulnerability as
GHSA-fghv-69vj-qj49 resolved according to EUVD-2025-26640
Analysis Read only
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