XML External Entity (XXE) Injection Affecting netty-tcnative package, versions <2.0.80-150200.3.48.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.69% (51st percentile)

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  • Snyk IDSNYK-SLES154-NETTYTCNATIVE-18533033
  • published5 Aug 2026
  • disclosed4 Aug 2026

Introduced: 4 Aug 2026

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

How to fix?

Upgrade SLES:15.4 netty-tcnative to version 2.0.80-150200.3.48.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream netty-tcnative package and not the netty-tcnative package as distributed by SLES. See How to fix? for SLES:15.4 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