HTTP Request Smuggling Affecting netty package, versions *


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
2.84% (86th percentile)

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  • Snyk IDSNYK-UBUNTU1604-NETTY-1164745
  • published19 Aug 2025
  • disclosed29 Jan 2020

Introduced: 29 Jan 2020

CVE-2019-20445  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:16.04 netty.

NVD Description

Note: Versions mentioned in the description apply only to the upstream netty package and not the netty package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

HttpObjectDecoder.java in Netty before 4.1.44 allows a Content-Length header to be accompanied by a second Content-Length header, or by a Transfer-Encoding header.

References

CVSS Base Scores

version 3.1