Bug 2477232 (CVE-2026-42581) - CVE-2026-42581 netty: io.netty/netty-codec-http: Netty: HTTP Request Smuggling due to improper handling of conflicting HTTP/1.0 headers
Summary: CVE-2026-42581 netty: io.netty/netty-codec-http: Netty: HTTP Request Smugglin...
Keywords:
Status: NEW
Alias: CVE-2026-42581
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: 2482503
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-13 19:02 UTC by OSIDB Bzimport
Modified: 2026-09-30 13:16 UTC (History)
112 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-2026:28010 0 None None None 2026-06-22 17:16:06 UTC
Red Hat Product Errata RHSA-2026:37390 0 None None None 2026-07-09 15:30:45 UTC
Red Hat Product Errata RHSA-2026:53644 0 None None None 2026-08-11 16:37:27 UTC
Red Hat Product Errata RHSA-2026:53645 0 None None None 2026-09-17 17:49:02 UTC
Red Hat Product Errata RHSA-2026:53646 0 None None None 2026-09-17 17:47:14 UTC
Red Hat Product Errata RHSA-2026:53806 0 None None None 2026-08-11 17:42:14 UTC
Red Hat Product Errata RHSA-2026:66488 0 None None None 2026-09-10 16:35:09 UTC
Red Hat Product Errata RHSA-2026:66545 0 None None None 2026-09-10 23:23:21 UTC
Red Hat Product Errata RHSA-2026:69459 0 None None None 2026-09-21 14:39:52 UTC
Red Hat Product Errata RHSA-2026:73644 0 None None None 2026-09-30 00:11:21 UTC
Red Hat Product Errata RHSA-2026:73976 0 None None None 2026-09-30 13:16:04 UTC

Description OSIDB Bzimport 2026-05-13 19:02:49 UTC 
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpObjectDecoder strips a conflicting Content-Length header when a request carries both Transfer-Encoding: chunked and Content-Length, but only for HTTP/1.1 messages. The guard is absent for HTTP/1.0. An attacker that sends an HTTP/1.0 request with both headers causes Netty to decode the body as chunked while leaving Content-Length intact in the forwarded HttpMessage. Any downstream proxy or handler that trusts Content-Length over Transfer-Encoding will disagree on message boundaries, enabling request smuggling. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Comment 3 errata-xmlrpc 2026-06-22 17:16:00 UTC 
This issue has been addressed in the following products:

  Cryostat 4 on RHEL 9

Via RHSA-2026:28010 https://access.redhat.com/errata/RHSA-2026:28010
Comment 4 errata-xmlrpc 2026-07-09 15:30:39 UTC 
This issue has been addressed in the following products:

  Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16

Via RHSA-2026:37390 https://access.redhat.com/errata/RHSA-2026:37390
Comment 8 errata-xmlrpc 2026-08-11 16:37:22 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7

Via RHSA-2026:53644 https://access.redhat.com/errata/RHSA-2026:53644
Comment 9 errata-xmlrpc 2026-08-11 17:42:08 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 7.4.25

Via RHSA-2026:53806 https://access.redhat.com/errata/RHSA-2026:53806
Comment 10 errata-xmlrpc 2026-09-10 16:35:03 UTC 
This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.14.1

Via RHSA-2026:66488 https://access.redhat.com/errata/RHSA-2026:66488
Comment 11 errata-xmlrpc 2026-09-10 23:23:16 UTC 
This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.13.6

Via RHSA-2026:66545 https://access.redhat.com/errata/RHSA-2026:66545
Comment 12 Jon Orris 2026-09-17 17:47:09 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9

Via RHSA-2026:53646 https://access.redhat.com/errata/RHSA-2026:53646
Comment 13 Jon Orris 2026-09-17 17:48:56 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8

Via RHSA-2026:53645 https://access.redhat.com/errata/RHSA-2026:53645
Comment 14 Jon Orris 2026-09-21 14:39:45 UTC 
This issue has been addressed in the following products:

  AMQ Clients 2026.Q3

Via RHSA-2026:69459 https://access.redhat.com/errata/RHSA-2026:69459
Comment 15 Jon Orris 2026-09-30 00:11:16 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7

Via RHSA-2026:73644 https://access.redhat.com/errata/RHSA-2026:73644
Comment 16 Jon Orris 2026-09-30 13:15:57 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7

Via RHSA-2026:73976 https://access.redhat.com/errata/RHSA-2026:73976
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