HTTP Request Smuggling Affecting netty package, versions *


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.01% (2nd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-NETTY-16748424
  • published18 May 2026
  • disclosed13 May 2026

Introduced: 13 May 2026

NewCVE-2026-42585  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

There is no fixed version for Debian:unstable netty.

NVD Description

Note: Versions mentioned in the description apply only to the upstream netty package and not the netty package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty incorrectly parses malformed Transfer-Encoding, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.

CVSS Base Scores

version 3.1