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CVE-2026-28369— Undertow: undertow: request smuggling via malformed http request headers

CVSS 8.7 · High EPSS 0.05% · P14
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I. Basic Information for CVE-2026-28369

Vulnerability Information
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Vulnerability Title
Undertow: undertow: request smuggling via malformed http request headers
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Undertow 环境问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Undertow是美国Undertow公司的一个Web服务器。 Undertow存在环境问题漏洞，该漏洞源于处理以空格开头的HTTP请求头时违反标准，可能导致远程攻击者执行请求夹带攻击，从而绕过安全机制或访问受限信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat build of Apache Camel for Spring Boot 4-cpe:/a:redhat:camel_spring_boot:4
Red HatRed Hat build of Apache Camel - HawtIO 4-cpe:/a:redhat:apache_camel_hawtio:4
Red HatRed Hat Data Grid 8-cpe:/a:redhat:jboss_data_grid:8
Red HatRed Hat Enterprise Linux 10-cpe:/o:redhat:enterprise_linux:10
Red HatRed Hat Enterprise Linux 8-cpe:/o:redhat:enterprise_linux:8
Red HatRed Hat Enterprise Linux 8-cpe:/o:redhat:enterprise_linux:8
Red HatRed Hat Enterprise Linux 9-cpe:/o:redhat:enterprise_linux:9
Red HatRed Hat Fuse 7-cpe:/a:redhat:jboss_fuse:7
Red HatRed Hat JBoss Enterprise Application Platform 7-cpe:/a:redhat:jboss_enterprise_application_platform:7
Red HatRed Hat JBoss Enterprise Application Platform 8-cpe:/a:redhat:jboss_enterprise_application_platform:8
Red HatRed Hat JBoss Enterprise Application Platform 8-cpe:/a:redhat:jboss_enterprise_application_platform:8
Red HatRed Hat JBoss Enterprise Application Platform 8-cpe:/a:redhat:jboss_enterprise_application_platform:8
Red HatRed Hat JBoss Enterprise Application Platform Expansion Pack-cpe:/a:redhat:jbosseapxp
Red HatRed Hat JBoss Enterprise Application Platform Expansion Pack-cpe:/a:redhat:jbosseapxp
Red HatRed Hat JBoss Enterprise Application Platform Expansion Pack-cpe:/a:redhat:jbosseapxp
Red HatRed Hat Process Automation 7-cpe:/a:redhat:jboss_enterprise_bpms_platform:7
Red HatRed Hat Single Sign-On 7-cpe:/a:redhat:red_hat_single_sign_on:7

II. Public POCs for CVE-2026-28369

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III. Intelligence Information for CVE-2026-28369

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Same Patch Batch · Red Hat · 2026-03-27 · 4 CVEs total

CVE-2026-283688.7 HIGHUndertow: undertow: request smuggling via inconsistent header parsing
CVE-2026-283678.7 HIGHUndertow: undertow: request smuggling via `\r\r\r` as a header block terminator
CVE-2026-49485.5 MEDIUMFirewalld: firewalld: local unprivileged user can modify firewall state due to d-bus sette

IV. Related Vulnerabilities

Same product: Red Hat build of Apache Camel for Spring Boot 4
Same vendor: Red Hat
Same weakness: CWE-444

V. Comments for CVE-2026-28369

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