Critical 9.6Published Jan 7, 2026

CVE-2025-12543Undertow-core: undertow http server fails to reject malformed host headers leading to potential cache poisoning and ssrf

Updated under an hour ago (Oct 27, 2026, 11:10 PM ET)

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It affects Red Hat build of Apache Camel 4.14.4 for Spring Boot 3.5.11 and 18 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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Every CVE for Red Hat build of Apache Camel 4.14.4 for Spring Boot 3.5.11

Exploited in the last 30 days

A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications. The Undertow library fails to properly validate the Host header in incoming HTTP requests.As a result, requests containing malformed or malicious Host headers are processed without rejection, enabling attackers to poison caches, perform internal network scans, or hijack user sessions.

CVSS: 9.6 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
Weakness (CWE): CWE-20
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: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat build of Apache Camel 4.14.4 for Spring Boot 3.5.11 redhat:apache_camel_spring_boot	4.14	CNA record
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 redhat:jboss_enterprise_application_platform_eus	from 0:1.4.18-21.SP19_redhat_00001.1.ep7.el7 not affected	CNA record
Red Hat Red Hat JBoss Enterprise Application Platform 7.4.24 redhat:jboss_enterprise_application_platform	from 2.2.39.Final-redhat-00001 not affected	CNA record
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 redhat:jboss_enterprise_application_platform_els	from 0:2.2.39-1.Final_redhat_00001.1.el7eap not affected	CNA record
Red Hat Red Hat Single Sign-On 7.6.13 redhat:red_hat_single_sign_on	7.6	CNA record
Red Hat RHEL-8 based Middleware Containers redhat:rhosemc	from 7.6-85 not affected	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
1–10 of 31

References

References

https://access.redhat.com/errata/RHSA-2026:0383	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:0384	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:0386	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:33371	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:33372	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:3889	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:3890	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:3891	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:3892	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:4915	vendor-advisory, x-refsource-redhat
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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.