HTTP Request Smuggling Affecting jetty12 package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.31% (21st percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ECHOLATEST-JETTY12-19698195
  • published12 Sept 2026
  • disclosed8 Sept 2026

Introduced: 8 Sep 2026

CVE-2026-19203  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest jetty12.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jetty12 package and not the jetty12 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling.

This is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination.

CVSS Base Scores

version 3.1