CVE-2026-14180

Undertow-core: undertow:http request smuggling via oversized chunk-size bit overlap

State: Published
Severity: 5.3 Medium
Published: Aug 11, 2026
Updated: Oct 20, 2026
Reserved: Jun 30, 2026

Description

A flaw was found in the ChunkReader component of the Undertow HTTP server, which is used by WildFly and JBoss EAP to handle chunked transfer encoding. The issue occurs because the parser uses a single internal variable to store both the remaining chunk size and state flags. By sending a specially crafted request with an extremely large chunk size, an attacker can cause these values to overlap, tricking the parser into thinking a request has finished prematurely. This can allow a second, "smuggled" request to be processed out of sync, potentially bypassing security controls.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	redhat

Weaknesses

CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Affected Products

Product	Versions
Red Hat JBoss Enterprise Application Platform 8.1.8.GARed Hat	2.3.26.SP3-redhat-00001 and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.40.0-8.redhat_00024.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:4.1.7-1.SP1_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.0.5-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:1.85.0-1.redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:1.2.7-1.redhat_00002.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:801.8.0-1.GA_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:6.6.54-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:4.1.5-5.redhat_00008.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:3.0.22-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.18.9-1.redhat_00003.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.18.9-1.redhat_00003.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.18.9-1.redhat_00003.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.18.9-1.redhat_00003.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.18.9-1.redhat_00003.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.18.9-1.redhat_00003.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.18.9-1.redhat_00003.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:4.0.5-1.redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:4.0.7-4.redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.1.0-1.redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:3.6.3-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:5.0.31-1.SP2_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:3.1.0-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.2.0-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:7.4.0-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:3.0.1-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:5.1.0-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:4.0.11-2.SP1_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.25.4-1.redhat_00003.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:3.2.2-1.redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:4.1.136-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:4.1.136-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:9.37.4-1.redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:1.1.9-1.redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:3.0.6-1.redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.0.18-1.redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.3.26-2.SP3_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:8.1.8-9.GA_redhat_00006.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.6.11-1.Final_redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:8.1.1-12.GA_redhat_00048.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:2.3.2-1.redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Red Hat	0:3.0.6-1.redhat_00001.1.el10eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.40.0-8.redhat_00024.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:4.1.7-1.SP1_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.0.5-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:1.85.0-1.redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:1.2.7-1.redhat_00002.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:801.8.0-1.GA_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:6.6.54-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:4.1.5-5.redhat_00008.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:3.0.22-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.18.9-1.redhat_00003.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.18.9-1.redhat_00003.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.18.9-1.redhat_00003.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.18.9-1.redhat_00003.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.18.9-1.redhat_00003.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.18.9-1.redhat_00003.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.18.9-1.redhat_00003.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:4.0.5-1.redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:4.0.7-4.redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.1.0-1.redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:3.6.3-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:5.0.31-1.SP2_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:3.1.0-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.2.0-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:7.4.0-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:3.0.1-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:5.1.0-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:4.0.11-2.SP1_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.25.4-1.redhat_00003.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:3.2.2-1.redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:4.1.136-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:4.1.136-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:9.37.4-1.redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:1.1.9-1.redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:3.0.6-1.redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.0.18-1.redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.3.26-2.SP3_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:8.1.8-9.GA_redhat_00006.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.6.11-1.Final_redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:8.1.1-12.GA_redhat_00048.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:2.3.2-1.redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8Red Hat	0:3.0.6-1.redhat_00001.1.el8eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.40.0-8.redhat_00024.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:4.1.7-1.SP1_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.0.5-1.Final_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:1.85.0-1.redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:1.2.7-1.redhat_00002.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:801.8.0-1.GA_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:6.6.54-1.Final_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:4.1.5-5.redhat_00008.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:3.0.22-1.Final_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.18.9-1.redhat_00003.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.18.9-1.redhat_00003.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.18.9-1.redhat_00003.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.18.9-1.redhat_00003.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.18.9-1.redhat_00003.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.18.9-1.redhat_00003.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.18.9-1.redhat_00003.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:4.0.5-1.redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:4.0.7-4.redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.1.0-1.redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:3.6.3-1.Final_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:5.0.31-1.SP2_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:3.1.0-1.Final_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.2.0-1.Final_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:7.4.0-1.Final_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:3.0.1-1.Final_redhat_00001.1el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:5.1.0-1.Final_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:4.0.11-2.SP1_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.25.4-1.redhat_00003.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:3.2.2-1.redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:4.1.136-1.Final_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:4.1.136-1.Final_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:9.37.4-1.redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:1.1.9-1.redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:3.0.6-1.redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.0.18-1.redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.3.26-2.SP3_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:8.1.8-9.GA_redhat_00006.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.6.11-1.Final_redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:8.1.1-12.GA_redhat_00048.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:2.3.2-1.redhat_00001.1.el9eap and laterNot affected
Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9Red Hat	0:3.0.6-1.redhat_00001.1.el9eap and laterNot affected
Red Hat build of Apache Camel for Spring Boot 4Red Hat
Red Hat build of Apache Camel - HawtIO 4Red Hat
Red Hat Data Grid 8Red Hat
Red Hat Enterprise Linux 10Red Hat
Red Hat Enterprise Linux 8Red Hat
Red Hat Enterprise Linux 8Red Hat
Red Hat Enterprise Linux 9Red Hat
Red Hat Fuse 7Red Hat
Red Hat JBoss Enterprise Application Platform 7Red Hat
Red Hat JBoss Enterprise Application Platform 7Red Hat
Red Hat JBoss Enterprise Application Platform 7Red Hat
Red Hat JBoss Enterprise Application Platform 7Red Hat
Red Hat JBoss Enterprise Application Platform 7Red Hat
Red Hat JBoss Enterprise Application Platform 7Red Hat
Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat
Red Hat Single Sign-On 7Red Hat

References

RHSA-2026:70228vendor-advisory
RHSA-2026:70229vendor-advisory
RHSA-2026:70230vendor-advisory
RHSA-2026:70277vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-14180vdb-entry
RHBZ#2494771issue-tracking

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