Bug 2452456 (CVE-2026-33871) - CVE-2026-33871 netty: Netty: Denial of Service via HTTP/2 CONTINUATION frame flood
Summary: CVE-2026-33871 netty: Netty: Denial of Service via HTTP/2 CONTINUATION frame ...
Keywords:
Status: NEW
Alias: CVE-2026-33871
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: 2453262 2453263
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-27 21:02 UTC by OSIDB Bzimport
Modified: 2026-05-18 12:22 UTC (History)
113 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:13571 0 None None None 2026-05-04 23:38:09 UTC
Red Hat Product Errata RHSA-2026:14272 0 None None None 2026-05-06 17:59:18 UTC
Red Hat Product Errata RHSA-2026:14276 0 None None None 2026-05-06 18:00:01 UTC
Red Hat Product Errata RHSA-2026:17668 0 None None None 2026-05-14 16:55:38 UTC
Red Hat Product Errata RHSA-2026:18054 0 None None None 2026-05-18 12:22:15 UTC
Red Hat Product Errata RHSA-2026:18055 0 None None None 2026-05-18 12:19:23 UTC
Red Hat Product Errata RHSA-2026:18059 0 None None None 2026-05-18 12:12:47 UTC
Red Hat Product Errata RHSA-2026:8159 0 None None None 2026-04-14 17:21:07 UTC
Red Hat Product Errata RHSA-2026:8509 0 None None None 2026-04-16 15:32:47 UTC

Description OSIDB Bzimport 2026-03-27 21:02:36 UTC 
Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, a remote user can trigger a Denial of Service (DoS) against a Netty HTTP/2 server by sending a flood of `CONTINUATION` frames. The server's lack of a limit on the number of `CONTINUATION` frames, combined with a bypass of existing size-based mitigations using zero-byte frames, allows an user to cause excessive CPU consumption with minimal bandwidth, rendering the server unresponsive. Versions 4.1.132.Final and 4.2.10.Final fix the issue.
Comment 1 errata-xmlrpc 2026-04-14 17:20:59 UTC 
This issue has been addressed in the following products:

  Red Hat Build of Apache Camel 4.14 for Quarkus 3.27

Via RHSA-2026:8159 https://access.redhat.com/errata/RHSA-2026:8159
Comment 2 errata-xmlrpc 2026-04-16 15:32:38 UTC 
This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.14.0

Via RHSA-2026:8509 https://access.redhat.com/errata/RHSA-2026:8509
Comment 3 errata-xmlrpc 2026-05-04 23:38:03 UTC 
This issue has been addressed in the following products:

  Streams for Apache Kafka 3.2.0

Via RHSA-2026:13571 https://access.redhat.com/errata/RHSA-2026:13571
Comment 4 errata-xmlrpc 2026-05-06 17:59:11 UTC 
This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.13.5

Via RHSA-2026:14272 https://access.redhat.com/errata/RHSA-2026:14272
Comment 5 errata-xmlrpc 2026-05-06 17:59:53 UTC 
This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.12.7

Via RHSA-2026:14276 https://access.redhat.com/errata/RHSA-2026:14276
Comment 6 errata-xmlrpc 2026-05-14 16:55:32 UTC 
This issue has been addressed in the following products:

  Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14

Via RHSA-2026:17668 https://access.redhat.com/errata/RHSA-2026:17668
Comment 7 errata-xmlrpc 2026-05-18 12:12:41 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 8.1

Via RHSA-2026:18059 https://access.redhat.com/errata/RHSA-2026:18059
Comment 8 errata-xmlrpc 2026-05-18 12:19:16 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9

Via RHSA-2026:18055 https://access.redhat.com/errata/RHSA-2026:18055
Comment 9 errata-xmlrpc 2026-05-18 12:22:09 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8

Via RHSA-2026:18054 https://access.redhat.com/errata/RHSA-2026:18054
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