High 8.7Published Mar 27, 2026

CVE-2026-28368Undertow: undertow: request smuggling via inconsistent header parsing

Updated under an hour ago (Oct 26, 2026, 2:30 PM ET)

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It affects Red Hat JBoss Enterprise Application Platform 8.1.6 and 16 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat JBoss Enterprise Application Platform 8.1.6

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Weakness (CWE): CWE-444
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat JBoss Enterprise Application Platform 8.1.6 redhat:jboss_enterprise_application_platform	from 2.3.24.SP2-redhat-00001 not affected	CNA record
Red Hat Red Hat build of Apache Camel for Spring Boot 4 redhat:camel_spring_boot	4	CNA record
Red Hat Red Hat build of Apache Camel - HawtIO 4 redhat:apache_camel_hawtio	4	CNA record
Red Hat Red Hat Data Grid 8 redhat:jboss_data_grid	8	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	10	CNA record
Red Hat Red Hat Fuse 7 redhat:jboss_fuse	7	CNA record
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack redhat:jbosseapxp	All versions	CNA record
Red Hat Red Hat Process Automation 7 redhat:jboss_enterprise_bpms_platform	7	CNA record
Red Hat Red Hat Single Sign-On 7 redhat:red_hat_single_sign_on	7	CNA record
redhat build_of_apache_camel_-_hawtio redhat:build_of_apache_camel_-_hawtio	4.0	NVD
1–10 of 19

References

References

https://access.redhat.com/errata/RHSA-2026:25125	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:25126	vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2026-28368	vdb-entry, x-refsource-redhat, vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2443261	issue-tracking, x-refsource-redhat, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.