HTTP Request Smuggling Affecting jetty9 package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.31% (21st percentile)

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  • Snyk IDSNYK-ECHOLATEST-JETTY9-19698192
  • published12 Sept 2026
  • disclosed8 Sept 2026

Introduced: 8 Sep 2026

NewCVE-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 jetty9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jetty9 package and not the jetty9 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