CVE-2026-73508: Netty: Memory Leak in DNS Record Decoder via Malformed Domain Names

CVE-2026-73508 · Severity: low · CVSS 3.1 · Published 2026-07-24

Netty: Memory Leak in DNS Record Decoder via Malformed Domain Names

Vendors: Maven.

Quick answers

Is CVE-2026-73508 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-73508 being exploited in the wild.
How severe is CVE-2026-73508?
Low severity, with a CVSS score of 3.1, published 24 July 2026.
Which products and versions are affected?
io.netty:netty-codec-dns (Maven) ECOSYSTEM:introduced=4.2.0.Final,fixed=4.2.16.Final.
Is there a fix for CVE-2026-73508?
Yes. io.netty:netty-codec-dns (Maven): upgrade to 4.2.16.Final or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-73508?
Check whether you run io.netty:netty-codec-dns (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • io.netty:netty-codec-dns (Maven): upgrade to 4.2.16.Final or later
    # set io.netty:netty-codec-dns to 4.2.16.Final in your pom.xml or build.gradle

Affected products

  • io.netty:netty-codec-dns (Maven) ECOSYSTEM:introduced=4.2.0.Final,fixed=4.2.16.Final

Identifiers

  • CVE-2026-73508
  • GHSA-mfg7-5gfp-c4w3

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