CVE-2026-28369

8.7 HIGH

A flaw was found in Undertow

Published: 2026-03-27 · Last updated: 2026-06-10

Severity and scoring

CVSS: 8.7 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
CWE: CWE-444

Affected products

Vendor	Product
redhat	build_of_apache_camel_-_hawtio, build_of_apache_camel_for_spring_boot, data_grid

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

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-28369
[Other]https://access.redhat.com/errata/RHSA-2026:25125
[Other]https://access.redhat.com/errata/RHSA-2026:25126
[Vendor advisory]https://access.redhat.com/security/cve/CVE-2026-28369
[Vendor advisory]https://bugzilla.redhat.com/show_bug.cgi?id=2443262

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