HTTP Request Smuggling Affecting thingsboard package, versions <4.3.1-r4


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.01% (3rd percentile)

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  • Snyk IDSNYK-WOLFILATEST-THINGSBOARD-15855227
  • published31 Mar 2026
  • disclosed27 Mar 2026

Introduced: 27 Mar 2026

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

How to fix?

Upgrade Wolfi thingsboard to version 4.3.1-r4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thingsboard package and not the thingsboard package as distributed by Wolfi. See How to fix? for Wolfi 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