Undertow: undertow madeyoureset http/2 ddos vulnerability
Summary
| CVE | CVE-2025-9784 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-09-02 14:15:36 UTC |
| Updated | 2026-06-30 03:17:01 UTC |
| Description | A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters. This issue, referred to as the "MadeYouReset" attack, allows malicious clients to induce excessive server workload by repeatedly causing server-side stream aborts. While not a protocol bug, this highlights a common implementation weakness that can be exploited to cause a denial of service (DoS). |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.021700000 probability, percentile 0.800470000 (date 2026-07-01)
Problem Types: CWE-770 | CWE-404 | CWE-770 Allocation of Resources Without Limits or Throttling | CWE-404 CWE-404 Improper Resource Shutdown or Release
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Redhat | Build Of Apache Camel For Spring Boot | - | All | All | All |
| Operating System | Redhat | Enterprise Linux | 8.0 | All | All | All |
| Operating System | Redhat | Enterprise Linux | 9.0 | All | All | All |
| Application | Redhat | Fuse | 7.0.0 | All | All | All |
| Application | Redhat | Jboss Enterprise Application Platform | 7.0.0 | All | All | All |
| Application | Redhat | Jboss Enterprise Application Platform | 8.0.0 | All | All | All |
| Application | Redhat | Jboss Enterprise Application Platform Expansion Pack | - | All | All | All |
| Application | Redhat | Process Automation | 7.0 | All | All | All |
| Application | Redhat | Single Sign-on | 7.0 | All | All | All |
| Application | Redhat | Undertow | - | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Hat | Red Hat Build Of Apache Camel 4.14.2 For Spring Boot 3.5.8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform | unaffected 2.2.39.Final-redhat-00001 * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.1 EUS For RHEL 7 | unaffected 0:1.4.18-21.SP19_redhat_00001.1.ep7.el7 * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.3 EUS For RHEL 7 | unaffected 0:2.0.41-8.SP9_redhat_00001.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 | unaffected 0:2.2.39-1.Final_redhat_00001.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 7 | unaffected 0:7.4.24-4.GA_redhat_00002.1.el7eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 8 | unaffected 0:2.2.39-1.Final_redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 8 | unaffected 0:7.4.24-4.GA_redhat_00002.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 9 | unaffected 0:2.2.39-1.Final_redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS On RHEL 9 | unaffected 0:7.4.24-4.GA_redhat_00002.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 8 | unaffected 0:1.83.0-1.redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 8 | unaffected 0:33.0.0-2.jre_redhat_00003.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 8 | unaffected 0:4.0.6-1.redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 8 | unaffected 0:1.0.0-3.redhat_00009.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 8 | unaffected 0:2.0.2-1.Final_redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 8 | unaffected 0:2.3.23-1.SP3_redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 9 | unaffected 0:1.83.0-1.redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 9 | unaffected 0:33.0.0-2.jre_redhat_00003.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 9 | unaffected 0:4.0.6-1.redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 9 | unaffected 0:1.0.0-3.redhat_00009.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 9 | unaffected 0:2.0.2-1.Final_redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.0 For RHEL 9 | unaffected 0:2.3.23-1.SP3_redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:4.0.10-1.redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:1.82.0-1.redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:801.3.0-1.GA_redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:1.0.1-3.redhat_00003.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:6.6.36-1.Final_redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:4.0.2-1.Final_redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:2.5.0-1.redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:2.3.20-2.SP4_redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:8.1.3-4.GA_redhat_00006.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:5.0.12-1.Final_redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:2.6.6-1.Final_redhat_00001.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 8 | unaffected 0:8.1.1-4.GA_redhat_00007.1.el8eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:4.0.10-1.redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:1.82.0-1.redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:801.3.0-1.GA_redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:1.0.1-3.redhat_00003.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:6.6.36-1.Final_redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:4.0.2-1.Final_redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:2.5.0-1.redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:2.3.20-2.SP4_redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:8.1.3-4.GA_redhat_00006.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:5.0.12-1.Final_redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:2.6.6-1.Final_redhat_00001.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 For RHEL 9 | unaffected 0:8.1.1-4.GA_redhat_00007.1.el9eap * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Apache Camel - HawtIO 4 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Data Grid 8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 10 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Fuse 7 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 7 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform 8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | Not specified | Not specified |
| CNA | Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | Not specified | Not specified |
| CNA | Red Hat | Red Hat Process Automation 7 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Single Sign-On 7 | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2026:33372 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:3889 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4924 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0386 | [email protected] | access.redhat.com | |
| github.com/undertow-io/undertow/releases/tag/2.2.38.Final | [email protected] | github.com | |
| access.redhat.com/errata/RHSA-2026:4916 | [email protected] | access.redhat.com | |
| www.kb.cert.org/vuls/id/767506 | af854a3a-2127-422b-91ae-364da2661108 | www.kb.cert.org | |
| access.redhat.com/errata/RHSA-2026:3891 | [email protected] | access.redhat.com | |
| issues.redhat.com/browse/UNDERTOW-2598 | [email protected] | issues.redhat.com | |
| access.redhat.com/errata/RHSA-2026:3892 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0383 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4915 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:33371 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2025:23143 | [email protected] | access.redhat.com | |
| kb.cert.org/vuls/id/767506 | [email protected] | kb.cert.org | |
| access.redhat.com/security/cve/CVE-2025-9784 | [email protected] | access.redhat.com | Vendor Advisory |
| github.com/undertow-io/undertow/pull/1778 | [email protected] | github.com | |
| access.redhat.com/errata/RHSA-2026:0384 | [email protected] | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | [email protected] | bugzilla.redhat.com | Issue Tracking |
| access.redhat.com/errata/RHSA-2026:4917 | [email protected] | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2025-09-01T06:19:20.938Z | Reported to Red Hat. |
| CNA | 2025-09-01T06:21:54.614Z | Made public. |
Workarounds
CNA: No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
There are currently no legacy QID mappings associated with this CVE.