Bug 2515374 (CVE-2026-73507) - CVE-2026-73507 io.netty/netty-codec-xml: Netty: Denial of Service via CPU Exhaustion in XmlFrameDecoder
Summary: CVE-2026-73507 io.netty/netty-codec-xml: Netty: Denial of Service via CPU Exh...
Keywords:
Status: NEW
Alias: CVE-2026-73507
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-13 15:50 UTC by OSIDB Bzimport
Modified: 2026-09-24 19:57 UTC (History)
36 users (show)

Fixed In Version:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:71675 0 None None None 2026-09-24 19:57:39 UTC

Description OSIDB Bzimport 2026-08-13 15:50:57 UTC 
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.xml.XmlFrameDecoder.decode() failed to preserve closing-tag parser state across invocations, so an unauthenticated remote attacker could trickle-feed repeated </ sequences that repeatedly rescanned the accumulated buffer and exhausted an EventLoop thread's CPU, causing denial of service with a maxFrameLength of 1 MB. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Comment 1 Jon Orris 2026-09-24 19:57:36 UTC 
This issue has been addressed in the following products:

  Red Hat build of Apache Camel 4.18.4 for Spring Boot 3.5.16

Via RHSA-2026:71675 https://access.redhat.com/errata/RHSA-2026:71675
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