Bug 2443261 (CVE-2026-28368) - CVE-2026-28368 undertow: Undertow: Request smuggling via inconsistent header parsing
Summary: CVE-2026-28368 undertow: Undertow: Request smuggling via inconsistent header ...
Keywords:
Status: NEW
Alias: CVE-2026-28368
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-27 04:44 UTC by OSIDB Bzimport
Modified: 2026-06-10 20:27 UTC (History)
50 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-2026:25125 0 None None None 2026-06-10 20:27:10 UTC
Red Hat Product Errata RHSA-2026:25126 0 None None None 2026-06-10 20:25:08 UTC

Description OSIDB Bzimport 2026-02-27 04:44:48 UTC 
Undertow splits header names from values on either space or colon, whichever comes first. This allows for the construction of crafted requests with headers that are visible only to Undertow, but not upstream proxies, which can be used to launch request smuggling attacks.
Comment 2 errata-xmlrpc 2026-06-10 20:25:05 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 8.1

Via RHSA-2026:25126 https://access.redhat.com/errata/RHSA-2026:25126
Comment 3 errata-xmlrpc 2026-06-10 20:27:07 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
  Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8

Via RHSA-2026:25125 https://access.redhat.com/errata/RHSA-2026:25125
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