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.
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Redhat
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History
Fri, 27 Mar 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| Title | Undertow: undertow: request smuggling via malformed http request headers | |
| First Time appeared |
Redhat
Redhat apache Camel Hawtio Redhat camel Spring Boot Redhat enterprise Linux Redhat jboss Data Grid Redhat jboss Enterprise Application Platform Redhat jboss Enterprise Bpms Platform Redhat jboss Fuse Redhat jbosseapxp Redhat red Hat Single Sign On |
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| Weaknesses | CWE-444 | |
| CPEs | cpe:/a:redhat:apache_camel_hawtio:4 cpe:/a:redhat:camel_spring_boot:4 cpe:/a:redhat:jboss_data_grid:8 cpe:/a:redhat:jboss_enterprise_application_platform:7 cpe:/a:redhat:jboss_enterprise_application_platform:8 cpe:/a:redhat:jboss_enterprise_bpms_platform:7 cpe:/a:redhat:jboss_fuse:7 cpe:/a:redhat:jbosseapxp cpe:/a:redhat:red_hat_single_sign_on:7 cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
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| Vendors & Products |
Redhat
Redhat apache Camel Hawtio Redhat camel Spring Boot Redhat enterprise Linux Redhat jboss Data Grid Redhat jboss Enterprise Application Platform Redhat jboss Enterprise Bpms Platform Redhat jboss Fuse Redhat jbosseapxp Redhat red Hat Single Sign On |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-03-27T16:13:05.719Z
Reserved: 2026-02-27T04:42:16.439Z
Link: CVE-2026-28369
No data.
Status : Received
Published: 2026-03-27T17:16:28.240
Modified: 2026-03-27T17:16:28.240
Link: CVE-2026-28369
No data.
OpenCVE Enrichment
No data.
Weaknesses