CVE-2019-16869

PoC —

CVSS 3.1

7.5 high

EPSS

8%p95

Published

Sep 26, 2019 (Sep 26, 2019)

Modified

Jun 17, 2026

Description

Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a "Transfer-Encoding : chunked" line), which leads to HTTP request smuggling.

Vendors: netty debian canonical redhat
Products: netty, debian linux, ubuntu linux, jboss enterprise application platform
Weakness: CWE-444
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD CVE.org GitHub PoCs EPSS (8.4%)

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