CVE-2026-28369

EUVD-2026-16698
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.
HTTP Request/Response Smuggling
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.7 HIGH
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 48.86%
Affected Products (NVD)
VendorProductVersion
redhatbuild_of_apache_camel_-_hawtio
4.0
redhatbuild_of_apache_camel_for_spring_boot
4.0
redhatdata_grid
8.0
redhatfuse
7.0.0
redhatjboss_enterprise_application_platform
7.0.0
redhatjboss_enterprise_application_platform
8.0.0
redhatjboss_enterprise_application_platform_expansion_pack
-
redhatprocess_automation
7.0
redhatsingle_sign-on
7.0
redhatundertow
-
redhatenterprise_linux
9.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
undertow
forky
vulnerable
sid
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
undertow
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
ignored