high8.7
CVE-2026-28368
Undertow is Vulnerable to HTTP Request/Response Smuggling
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | io.undertow:undertow-parent | <= 2.3.23.Final | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redhat | Build Of Apache Camel - Hawtio | Version 4.0 |
| Redhat | Build Of Apache Camel For Spring Boot | Version 4.0 |
| Redhat | Data Grid | Version 8.0 |
| Redhat | Fuse | Version 7.0.0 |
| Redhat | Jboss Enterprise Application Platform | Versions 7.0.0, 8.0.0 |
| Redhat | Jboss Enterprise Application Platform Expansion Pack | All versions |
| Redhat | Process Automation | Version 7.0 |
| Redhat | Single Sign-On | Version 7.0 |
| Redhat | Undertow | All versions |
| Redhat | Enterprise Linux | Version 9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://access.redhat.com/errata/RHSA-2026:25125
- https://access.redhat.com/errata/RHSA-2026:25126
- https://access.redhat.com/security/cve/CVE-2026-28368
- https://bugzilla.redhat.com/show_bug.cgi?id=2443261
- https://github.com/advisories/GHSA-8v4x-mgvp-p658
- https://nvd.nist.gov/vuln/detail/CVE-2026-28368