CVE-2026-28367 (GCVE-0-2026-28367)

Vulnerability from cvelistv5 – Published: 2026-03-27 16:13 – Updated: 2026-06-10 21:04
VLAI
Title
Undertow: undertow: request smuggling via `\r\r\r` as a header block terminator
Summary
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.
Severity
8.7 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:25125 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25126 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-28367 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2443260 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat JBoss Enterprise Application Platform 8.1     cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
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Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 Unaffected: 0:2.40.0-7.redhat_00015.1.el8eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
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Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 Unaffected: 0:801.6.1-1.GA_redhat_00001.1.el8eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 Unaffected: 0:2.3.24-3.SP2_redhat_00001.1.el8eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 Unaffected: 0:8.1.6-7.GA_redhat_00010.1.el8eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 Unaffected: 0:2.40.0-7.redhat_00015.1.el9eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 Unaffected: 0:801.6.1-1.GA_redhat_00001.1.el9eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 Unaffected: 0:2.3.24-3.SP2_redhat_00001.1.el9eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 Unaffected: 0:8.1.6-7.GA_redhat_00010.1.el9eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8
    cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
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Red Hat Red Hat build of Apache Camel for Spring Boot 4     cpe:/a:redhat:camel_spring_boot:4
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Red Hat Red Hat build of Apache Camel - HawtIO 4     cpe:/a:redhat:apache_camel_hawtio:4
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Red Hat Red Hat Data Grid 8     cpe:/a:redhat:jboss_data_grid:8
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Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat Fuse 7     cpe:/a:redhat:jboss_fuse:7
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Red Hat Red Hat JBoss Enterprise Application Platform 7     cpe:/a:redhat:jboss_enterprise_application_platform:7
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Red Hat Red Hat JBoss Enterprise Application Platform 8     cpe:/a:redhat:jboss_enterprise_application_platform:8
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Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack     cpe:/a:redhat:jbosseapxp
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Red Hat Red Hat Process Automation 7     cpe:/a:redhat:jboss_enterprise_bpms_platform:7
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Red Hat Red Hat Single Sign-On 7     cpe:/a:redhat:red_hat_single_sign_on:7
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Date Public
2025-08-27 00:00
Show details on NVD website
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}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.