CVE-2026-28368

Description

A flaw was found in Undertow. This vulnerability allows a remote attacker to construct specially crafted requests where header names are parsed differently by Undertow compared to upstream proxies. This discrepancy in header interpretation can be exploited to launch request smuggling attacks, potentially bypassing security controls and accessing unauthorized resources.

CVSS breakdown

Affected products

• RedHat / build_of_apache_camel_for_spring_boot4.0 – 4.0
• RedHat / build_of_apache_camel_-_hawtio4.0 – 4.0
• RedHat / data_grid8.0 – 8.0
• RedHat / enterprise_linux9.0 – 9.0
• RedHat / fuse7.0.0 – 7.0.0
• RedHat / jboss_enterprise_application_platform8.0.0 – 8.0.0
• RedHat / jboss_enterprise_application_platform7.0.0 – 7.0.0
• RedHat / jboss_enterprise_application_platform_expansion_pack
• RedHat / process_automation7.0 – 7.0
• RedHat / single_sign-on7.0 – 7.0
• RedHat / undertow

References

• VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:25125
• VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:25126
• VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2026-28368
• MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2443261