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8.7High

CVE-2026-28367Undertow: undertow: request smuggling via `\r\r\r` as a header block terminator

Red Hat Red Hat JBoss Enterprise Application Platform 8.1.6; Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8; Red Hat Red Hat JBoss Enterp… Published: (7 months ago)

Description

A flaw was found in Undertow. A remote attacker can exploit this vulnerability by sending `\r\r\r` as a header block terminator. This can be used for request smuggling with certain proxy servers, such as older versions of Apache Traffic Server and Google Cloud Classic Application Load Balancer, potentially leading to unauthorized access or manipulation of web requests.

Weakness (CWE): CWE-444

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

VendorProductVersions
jboss enterprise application platform 8.1 —
redhat build of apache camel for spring boot 4.0
redhat build of apache camel - hawtio 4.0
redhat data grid 8.0
redhat fuse 7.0.0
redhat jboss enterprise application platform 7.0.0
redhat jboss enterprise application platform expansion pack —
redhat process automation 7.0
Red Hat Red Hat build of Apache Camel for Spring Boot 4 all versions
Red Hat Red Hat build of Apache Camel - HawtIO 4 —
Red Hat Red Hat Data Grid 8 all versions
Red Hat Red Hat Enterprise Linux 10 —
Red Hat Red Hat Enterprise Linux 8 —
Red Hat Red Hat Enterprise Linux 9 —
Red Hat Red Hat Fuse 7 all versions
Red Hat Red Hat JBoss Enterprise Application Platform 7 all versions
Red Hat Red Hat JBoss Enterprise Application Platform 8 all versions
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 all versions
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 all versions
Red Hat Red Hat JBoss Enterprise Application Platform 8.1.6 all versions
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack all versions
Red Hat Red Hat Process Automation 7 all versions
Red Hat Red Hat Single Sign-On 7 all versions
redhat single sign-on 7.0
redhat undertow —

References and patches

CPE matches (NVD) (10)
  • cpe:2.3:a:redhat:build_of_apache_camel_-_hawtio:4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:build_of_apache_camel_for_spring_boot:4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:data_grid:8.0:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:fuse:7.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:jboss_enterprise_application_platform:8.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:process_automation:7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:undertow:-:*:*:*:*:*:*:*

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