CVE-2025-12543
CVE-2025-12543 · Undertow-core: undertow http server fails to reject malformed host headers leading to potential cache poisoning and ssrf
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 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 · EPSS 1.3% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
red hat build of apache camel 4.14.4 for spring boot 3.5.11
No fix published
red hat jboss enterprise application platform 7.1 eus for rhel 7
- Versions
- ≥ 0:1.4.18-21.SP19_redhat_00001.1.ep7.el7: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 7.3 eus for rhel 7
- Versions
- ≥ 0:2.0.41-8.SP9_redhat_00001.1.el7eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 7.4.24
- Versions
- ≥ 2.2.39.Final-redhat-00001: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 7.4 els on rhel 7
- Versions
- ≥ 0:2.2.39-1.Final_redhat_00001.1.el7eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 7.4 els on rhel 7
- Versions
- ≥ 0:7.4.24-4.GA_redhat_00002.1.el7eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 7.4 els on rhel 8
- Versions
- ≥ 0:2.2.39-1.Final_redhat_00001.1.el8eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 7.4 els on rhel 8
- Versions
- ≥ 0:7.4.24-4.GA_redhat_00002.1.el8eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 7.4 els on rhel 9
- Versions
- ≥ 0:2.2.39-1.Final_redhat_00001.1.el9eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 7.4 els on rhel 9
- Versions
- ≥ 0:7.4.24-4.GA_redhat_00002.1.el9eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0
No fix published
red hat jboss enterprise application platform 8.0 for rhel 8
- Versions
- ≥ 0:1.83.0-1.redhat_00001.1.el8eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0 for rhel 8
- Versions
- ≥ 0:33.0.0-2.jre_redhat_00003.1.el8eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0 for rhel 8
- Versions
- ≥ 0:4.0.6-1.redhat_00001.1.el8eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0 for rhel 8
- Versions
- ≥ 0:1.0.0-3.redhat_00009.1.el8eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0 for rhel 8
- Versions
- ≥ 0:2.0.2-1.Final_redhat_00001.1.el8eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0 for rhel 8
- Versions
- ≥ 0:2.3.23-1.SP3_redhat_00001.1.el8eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0 for rhel 9
- Versions
- ≥ 0:1.83.0-1.redhat_00001.1.el9eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0 for rhel 9
- Versions
- ≥ 0:33.0.0-2.jre_redhat_00003.1.el9eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0 for rhel 9
- Versions
- ≥ 0:4.0.6-1.redhat_00001.1.el9eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0 for rhel 9
- Versions
- ≥ 0:1.0.0-3.redhat_00009.1.el9eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0 for rhel 9
- Versions
- ≥ 0:2.0.2-1.Final_redhat_00001.1.el9eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.0 for rhel 9
- Versions
- ≥ 0:2.3.23-1.SP3_redhat_00001.1.el9eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1.3
- Versions
- ≥ 2.3.20.SP4-redhat-00001: Not affected (rpm)
No fix published
Original sources
- https://access.redhat.com/errata/RHSA-2026:0383
- https://access.redhat.com/errata/RHSA-2026:0384
- https://access.redhat.com/errata/RHSA-2026:0386
- https://access.redhat.com/errata/RHSA-2026:33371
- https://access.redhat.com/errata/RHSA-2026:33372
- https://access.redhat.com/errata/RHSA-2026:3889
- https://access.redhat.com/errata/RHSA-2026:3890
- https://access.redhat.com/errata/RHSA-2026:3891
- https://access.redhat.com/errata/RHSA-2026:3892
- https://access.redhat.com/errata/RHSA-2026:4915
- https://access.redhat.com/errata/RHSA-2026:4916
- https://access.redhat.com/errata/RHSA-2026:4917
- https://access.redhat.com/errata/RHSA-2026:4924
- https://access.redhat.com/errata/RHSA-2026:76128
- https://access.redhat.com/errata/RHSA-2026:76129
- https://access.redhat.com/errata/RHSA-2026:76130
- https://access.redhat.com/errata/RHSA-2026:76132
- https://access.redhat.com/errata/RHSA-2026:76134
- https://access.redhat.com/security/cve/CVE-2025-12543
- https://bugzilla.redhat.com/show_bug.cgi?id=2408784
- https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-12543.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-12543