CVE-2026-28369

HIGH

8.7

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.

CVE Details

CVSS v3.1 Score8.7

SeverityHIGH

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

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published3/27/2026

Last Modified3/31/2026

Sourcenvd

Honeypot Sightings0

Affected Products

redhat:build_of_apache_camel_-_hawtioredhat:build_of_apache_camel_for_spring_bootredhat:data_gridredhat:enterprise_linuxredhat:fuseredhat:jboss_enterprise_application_platformredhat:jboss_enterprise_application_platform_expansion_packredhat:process_automationredhat:single_sign-onredhat:undertow

Weaknesses (CWE)

CWE-444

References

https://access.redhat.com/security/cve/CVE-2026-28369(secalert@redhat.com)

https://bugzilla.redhat.com/show_bug.cgi?id=2443262(secalert@redhat.com)

IOC Correlations

No correlations recorded

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