CVE-2026-28368

moderate-risk

Published 2026-03-27

A flaw was found in Undertow. This vulnerability allows a remote attacker to construct specially crafted requests where header names are parsed differently by Undertow compared to upstream proxies. This discrepancy in header interpretation can be exploited to launch request smuggling attacks, potentially bypassing security controls and accessing unauthorized resources.

Do I need to act?

0.11% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 8.7/10 High

NETWORK / HIGH complexity

Affected Products (11)

Build Of Apache Camel - Hawtio

Build Of Apache Camel For Spring Boot

Data Grid

Fuse

Jboss Enterprise Application Platform

Jboss Enterprise Application Platform Expansion Pack

Process Automation

Single Sign-On

Undertow

Enterprise Linux

Affected Vendors

Redhat

References (2)

Vendor Advisory https://access.redhat.com/security/cve/CVE-2026-28368

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2443261

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moderate-risk

Severity 26/34 · High

Exploitability 0/34 · Minimal

Exposure 16/34 · Moderate