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  5. GHSA-v74w-7mr3-4qg3

GHSA-v74w-7mr3-4qg3: Netty: Denial of Service in XmlFrameDecoder via CPU Exhaustion

July 24, 2026

An attacker can cause Denial of Service by sending a specially crafted malicious XML payload (e.g., repeated </ characters) to a Netty server utilizing XmlFrameDecoder, causing the server’s EventLoop thread to exhaust CPU resources and become unresponsive.

References

  • github.com/advisories/GHSA-v74w-7mr3-4qg3
  • github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b
  • github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6
  • github.com/netty/netty/pull/17063
  • github.com/netty/netty/pull/17065
  • github.com/netty/netty/releases/tag/netty-4.1.136.Final
  • github.com/netty/netty/releases/tag/netty-4.2.16.Final
  • github.com/netty/netty/security/advisories/GHSA-v74w-7mr3-4qg3

Code Behaviors & Features

Detect and mitigate GHSA-v74w-7mr3-4qg3 with GitLab Dependency Scanning

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Affected versions

All versions before 4.1.136, all versions starting from 4.2.0 before 4.2.16

Fixed versions

  • 4.1.136
  • 4.2.16

Solution

Upgrade to versions 4.1.136, 4.2.16 or above.

Impact 7.5 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Learn more about CVSS

Weakness

  • CWE-400: Uncontrolled Resource Consumption

Source file

maven/io.netty/netty-codec-xml/GHSA-v74w-7mr3-4qg3.yml

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