HTTP Request Smuggling Affecting netty package, versions <4.1.132-150200.4.43.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.64% (47th percentile)

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  • Snyk IDSNYK-SLES157-NETTY-16091354
  • published16 Apr 2026
  • disclosed15 Apr 2026

Introduced: 15 Apr 2026

CVE-2026-33870  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 netty to version 4.1.132-150200.4.43.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream netty package and not the netty package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue.

CVSS Base Scores

version 3.1