CVE-2025-9784
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).
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 2.3% chance of exploitation in the next 30 days; higher than 83% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-770, CWE-404
- Published
- Modified
- Record from
- the NVD, synced
Affected
- redhat:build_of_apache_camel_for_spring_boot
- redhat:enterprise_linux
- redhat:fuse
- redhat:jboss_enterprise_application_platform
- redhat:jboss_enterprise_application_platform_expansion_pack
- redhat:process_automation
- redhat:single_sign-on
- redhat:undertow
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-95h4-w6j8-2rp8 | Maven | io.undertow:undertow-core | <2.2.38.Final | 2.2.38.Final |
| GHSA-95h4-w6j8-2rp8 | Maven | io.undertow:undertow-core | >=2.3.0.Alpha1 <2.3.20.Final | 2.3.20.Final |