CVE-2026-28368
Fixed in a distro release EPSS <1%CVSS 8.7
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.
Products: Red Hat JBoss Enterprise Application Platform 8.1.6, Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8, Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9, Red Hat build of Apache Camel for Spring Boot 4, Red Hat build of Apache Camel - HawtIO 4, Red Hat Data Grid 8, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat Process Automation 7, Red Hat Single Sign-On 7
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Maven | io.undertow:undertow-parent | no fix |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 14 | undertow | no fix |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-cli | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-cli | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-commons | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-commons | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-core-client | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-core-client | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-dto | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-dto | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-hornetq-protocol | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-hornetq-protocol | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-hqclient-protocol | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-hqclient-protocol | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-jakarta-client | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-jakarta-client | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-jakarta-ra | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-jakarta-ra | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-jakarta-server | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-jakarta-server | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-jakarta-service-extensions | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-jakarta-service-extensions | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-jdbc-store | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-jdbc-store | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-journal | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-journal | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-selector | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-selector | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-server | 0:2.40.0-7.redhat_00015.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-activemq-artemis-server | 0:2.40.0-7.redhat_00015.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-eap-product-conf-parent | 0:801.6.1-1.GA_redhat_00001.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-eap-product-conf-parent | 0:801.6.1-1.GA_redhat_00001.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-eap-product-conf-wildfly-ee-feature-pack | 0:801.6.1-1.GA_redhat_00001.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-eap-product-conf-wildfly-ee-feature-pack | 0:801.6.1-1.GA_redhat_00001.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-undertow | 0:2.3.24-3.SP2_redhat_00001.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-undertow | 0:2.3.24-3.SP2_redhat_00001.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-wildfly | 0:8.1.6-7.GA_redhat_00010.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-wildfly | 0:8.1.6-7.GA_redhat_00010.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-wildfly-java-jdk17 | 0:8.1.6-7.GA_redhat_00010.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-wildfly-java-jdk17 | 0:8.1.6-7.GA_redhat_00010.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-wildfly-java-jdk21 | 0:8.1.6-7.GA_redhat_00010.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-wildfly-java-jdk21 | 0:8.1.6-7.GA_redhat_00010.1.el9eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-wildfly-modules | 0:8.1.6-7.GA_redhat_00010.1.el8eap |
| Red Hat jboss enterprise application platform 8.1 | eap8-wildfly-modules | 0:8.1.6-7.GA_redhat_00010.1.el9eap |
| Ubuntu 25.10 | undertow | no fix |
| Ubuntu 26.04 LTS | undertow | no fix |
| Ubuntu 26.10 | undertow | no fix |
| Ubuntu Pro 16.04 LTS | undertow | no fix |
| Ubuntu Pro 18.04 LTS | undertow | no fix |
| Ubuntu Pro 20.04 LTS | undertow | no fix |
| Ubuntu Pro 22.04 LTS | undertow | no fix |
| Ubuntu Pro 24.04 LTS | undertow | no fix |