p PatchFirst

CVE-2026-28368

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

This page shows selected source facts. See the linked advisories for the complete description and affected versions.

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 · EPSS 0.7%

Published
Updated

Stack: system

Affected products and versions

Original sources

Check your server →