XML External Entity (XXE) Injection Affecting thingsboard package, versions <4.3.1.3-r7


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.32% (25th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-THINGSBOARD-18310298
  • published26 Jul 2026
  • disclosed21 Jul 2026

Introduced: 21 Jul 2026

NewCVE-2026-56817  (opens in a new tab)
CWE-611  (opens in a new tab)

How to fix?

Upgrade Chainguard thingsboard to version 4.3.1.3-r7 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 Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, any caller that can deliver bytes to a Netty channel pipeline containing XmlDecoder can send XML with a DOCTYPE declaration to an AsyncXMLInputFactory instantiated with no security configuration, leaving DTD and entity handling active depending on Aalto XML async parser behavior and creating conditional XML external entity risk. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.

CVSS Base Scores

version 3.1