GHSA-95h4-w6j8-2rp8 · Severity: high · Ecosystem: maven — Undertow MadeYouReset HTTP/2 DDoS Vulnerability
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).
Conclusion & alert: CVE-2025-9784 is rated Moderate Risk (60.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.23%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-19 | 1.70% | 2.23% | +0.53% |
| 2 | 2026-05-08 | 1.55% | 1.70% | +0.15% |
| 3 | 2026-03-29 | — | 1.55% | — |
Full EPSS history (23 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-95h4-w6j8-2rp8 · Severity: high · Ecosystem: maven — Undertow MadeYouReset HTTP/2 DDoS Vulnerability
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2025-9784 not yet assigned priority: Debian including 1 source packages (undertow), 2 status rows across 2 suites (forky, sid): resolved 2. | https://security-tracker.debian.org/tracker/CVE-2025-9784 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2025-9784 |
ubuntu
|
medium | CVE-2025-9784 medium priority: Ubuntu including 2 source packages (resteasy, undertow), 15 status rows across 8 suites (bionic, focal, jammy, noble, plucky, questing, upstream, xenial): needs-triage 13, ignored 2. | https://ubuntu.com/security/CVE-2025-9784 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| redhat | build_of_apache_camel_for_spring_boot | — | cpe:2.3:a:redhat:build_of_apache_camel_for_spring_boot:-:*:*:*:*:*:*:* |
| redhat | fuse | 7.0.0 | cpe:2.3:a:redhat:fuse:7.0.0:*:*:*:*:*:*:* |
| redhat | jboss_enterprise_application_platform | 7.0.0 | cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.0.0:*:*:*:*:*:*:* |
| redhat | jboss_enterprise_application_platform | 8.0.0 | cpe:2.3:a:redhat:jboss_enterprise_application_platform:8.0.0:*:*:*:*:*:*:* |
| redhat | jboss_enterprise_application_platform_expansion_pack | — | cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:* |
| redhat | process_automation | 7.0 | cpe:2.3:a:redhat:process_automation:7.0:*:*:*:*:*:*:* |
| redhat | single_sign-on | 7.0 | cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:* |
| redhat | undertow | — | cpe:2.3:a:redhat:undertow:-:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* |
| redhat | enterprise_linux | 9.0 | cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |