CVE-2026-28368

Undertow: undertow: request smuggling via inconsistent header parsing

Published: Mar 27, 2026Updated: Sep 21, 2026 Sources: CVE List NVDCWE-444

8.7HIGH

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:NAvailability

None

Open in CVSS calculator →

Weaknesses

CWE-444

Affected Products

Red Hat

commercial·USaka redhat

build of apache camel - hawtioOn-prem

Operating Systems / linux-distro

build of apache camel for spring bootOn-prem

Operating Systems / linux-distro

data gridOn-prem

Operating Systems / linux-distro

fuseOn-prem

Operating Systems / linux-distro

jboss enterprise application platformOn-prem

Operating Systems / linux-distro

jboss enterprise application platform expansion packOn-prem

Operating Systems / linux-distro

process automationOn-prem

Operating Systems / linux-distro

single sign-onOn-prem

Operating Systems / linux-distro

and 17 more affected products View all →

Exploitability

Official Patch Available

Workaround Available

Is your org exposed to CVE-2026-28368?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique

Collection

View detailed technique mapping

References

https://access.redhat.com/errata/RHSA-2026:25125

access.redhat.com

https://access.redhat.com/errata/RHSA-2026:25126

access.redhat.com

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

access.redhat.com

and 1 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-28368 and every CVE in our database. Create a free account — no credit card required.

Create Free Account

Plain-language analysis

Impact assessment and exploitation scenario in plain English

Attack graph visualization

Interactive attack path and kill chain mapping

Exploit details & PoC links

ExploitDB, Metasploit, GitHub PoCs with direct links

Nuclei scanner templates

Ready-to-use vulnerability scanner templates

Full remediation guide

Patch instructions, workarounds, and compliance impact

Interactive AI chat

Ask questions about this vulnerability in natural language

Related vulnerabilities

Semantically similar CVEs and attack patterns

REST API & MCP access

Integrate vulnerability data into your workflows