CVE-2026-14180Undertow-core: undertow:http request smuggling via oversized chunk-size bit overlap
Updated under an hour ago ()
Does this affect you?
It affects Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 and 7 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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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.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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
- Awaiting Analysis
- Record last updated
- Sep 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 redhat:jboss_enterprise_application_platform | from 0:2.40.0-8.redhat_00024.1.el10eap 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 Single Sign-On 7 redhat:red_hat_single_sign_on | 7 | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:70228vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:70229vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:70230vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:70277vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-14180vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2494771issue-tracking, x-refsource-redhat
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.