NVD

CVE-2026-28369 Detail

Modified After Enrichment

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

Description

A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or more spaces, it incorrectly processes the request by stripping these leading spaces. This behavior, which violates HTTP standards, can be exploited by a remote attacker to perform request smuggling. Request smuggling allows an attacker to bypass security mechanisms, access restricted information, or manipulate web caches, potentially leading to unauthorized actions or data exposure.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 9.1 CRITICAL

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Nist CVSS score does not match with CNA score

CNA: Red Hat, Inc.

Base Score: 8.7 HIGH

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://access.redhat.com/errata/RHSA-2026:25125	Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:25126	Red Hat, Inc.
https://access.redhat.com/security/cve/CVE-2026-28369	Red Hat, Inc.	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2443262	Red Hat, Inc.	Issue Tracking Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-444	Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')	Red Hat, Inc.

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Change History

5 change records found show changes

CVE Modified by Red Hat, Inc. 6/17/2026 6:28:29 AM

Action

Type

Old Value

New Value

Added

Affected

Record truncated, showing 2048 of 8097 characters.
View Entire Change Record

[{"vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 8.1","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"undertow-core","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9"]},{"vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"eap8-activemq-artemis","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8","cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9"],"versions":[{"version":"0:2.40.0-7.redhat_00015.1.el8eap","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"eap8-eap-product-conf-parent","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8","cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9"],"versions":[{"version":"0:801.6.1-1.GA_redhat_00001.1.el8eap","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"eap8-undertow","cpes":["cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8","cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9"],"versions":[{"version":"0:2.3.24-3.SP2_redhat_00001.1.el8eap","lessThan":"*","versionType":"rpm","status":"unaffected"}]},{"vendor":"Red Hat","product":"Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"eap8-wildfly","cpes":["cpe:/a:redhat:jboss_enterprise_applicati

Initial Analysis by NIST 3/31/2026 2:08:21 PM

Action	Type	New Value
Added	CVSS V3.1	AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Added	CPE Configuration	OR cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.0.0::::::: cpe:2.3:a:redhat:undertow:-::::::: cpe:2.3:a:redhat:single_sign-on:7.0::::::: cpe:2.3:a:redhat:process_automation:7.0::::::: cpe:2.3:a:redhat:data_grid:8.0::::::: cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-::::::: cpe:2.3:o:redhat:enterprise_linux:9.0::::::: cpe:2.3:a:redhat:jboss_enterprise_application_platform:8.0.0::::::: cpe:2.3:a:redhat:fuse:7.0.0::::::: 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:::::::
Added	Reference Type	Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-28369 Types: Vendor Advisory
Added	Reference Type	Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2443262 Types: Issue Tracking, Vendor Advisory

New CVE Received from Red Hat, Inc. 3/27/2026 1:16:28 PM

Action	Type	New Value
Added	Description	A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or more spaces, it incorrectly processes the request by stripping these leading spaces. This behavior, which violates HTTP standards, can be exploited by a remote attacker to perform request smuggling. Request smuggling allows an attacker to bypass security mechanisms, access restricted information, or manipulate web caches, potentially leading to unauthorized actions or data exposure.
Added	CVSS V3.1	AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Added	CWE	CWE-444
Added	Reference	https://access.redhat.com/security/cve/CVE-2026-28369
Added	Reference	https://bugzilla.redhat.com/show_bug.cgi?id=2443262

Quick Info

CVE Dictionary Entry:
CVE-2026-28369
NVD Published Date:
03/27/2026
NVD Last Modified:
06/17/2026
Source:
Red Hat, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2026-28369 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

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Change History

CVE Modified by CISA-ADP 6/17/2026 6:28:29 AM

CVE Modified by Red Hat, Inc. 6/17/2026 6:28:29 AM

CVE Modified by Red Hat, Inc. 6/10/2026 6:16:56 PM

Initial Analysis by NIST 3/31/2026 2:08:21 PM

New CVE Received from Red Hat, Inc. 3/27/2026 1:16:28 PM

Quick Info