Riskcovery

CVE-2026-28367

Undertow: undertow: request smuggling via `\r\r\r` as a header block terminator

State
Published
Severity
8.7 High
Published
Mar 27, 2026
Updated
Oct 30, 2026
Reserved
Feb 27, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.18.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:Nredhat

Weaknesses

  • CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Affected Products

ProductVersions
Red Hat JBoss Enterprise Application Platform 8.1.6Red Hat
  • 2.3.24.SP2-redhat-00001 and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat
  • 0:2.40.0-7.redhat_00015.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat
  • 0:801.6.1-1.GA_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat
  • 0:2.3.24-3.SP2_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat
  • 0:8.1.6-7.GA_redhat_00010.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat
  • 0:2.40.0-7.redhat_00015.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat
  • 0:801.6.1-1.GA_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat
  • 0:2.3.24-3.SP2_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat
  • 0:8.1.6-7.GA_redhat_00010.1.el9eap and laterNot affected
Red Hat build of Apache Camel for Spring Boot 4Red Hat
    Red Hat build of Apache Camel - HawtIO 4Red Hat
      Red Hat Data Grid 8Red Hat
        Red Hat Enterprise Linux 10Red Hat
          Red Hat Enterprise Linux 8Red Hat
            Red Hat Enterprise Linux 8Red Hat
              Red Hat Enterprise Linux 9Red Hat
                Red Hat Fuse 7Red Hat
                  Red Hat JBoss Enterprise Application Platform 7Red Hat
                    Red Hat JBoss Enterprise Application Platform 8Red Hat
                      Red Hat JBoss Enterprise Application Platform 8Red Hat
                        Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat
                          Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat
                            Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat
                              Red Hat Process Automation 7Red Hat
                                Red Hat Single Sign-On 7Red Hat

                                  References

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