CVE-2025-9784Suited to automated attack · CISA

Undertow: undertow madeyoureset http/2 ddos vulnerability

CVSS score

7.5

EPSS probability

%2.3

Risk score

0.2

Published

1 y ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

Checking session…

Vulnerability description

DayBreach CVE AI Research

CVE-2025-9784 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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).

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2025-9784 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	redhat	undertow	View
2	Red Hat	Red Hat build of Apache Camel 4.14.2 for Spring Boot 3.5.8	View
3	Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	View
4	Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	View
5	Red Hat	Red Hat JBoss Enterprise Application Platform 7.4.24	View
6	Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7	View
7	Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7	View
8	Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8	View
9	Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8	View
10	Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9	View
11	Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9	View
12	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0	View
13	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	View
14	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	View
15	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	View
16	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	View
17	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	View
18	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	View
19	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	View
20	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	View
21	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	View
22	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	View
23	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	View
24	Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	View
25	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1.3	View
26	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
27	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
28	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
29	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
30	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
31	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
32	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
33	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
34	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
35	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
36	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
37	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	View
38	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
39	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
40	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
41	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
42	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
43	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
44	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
45	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
46	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
47	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
48	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
49	Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	View
50	Red Hat	Red Hat Single Sign-On 7.6.13	View
51	Red Hat	Red Hat Single Sign-On 7.6 for RHEL 7	View
52	Red Hat	Red Hat Single Sign-On 7.6 for RHEL 8	View
53	Red Hat	Red Hat Single Sign-On 7.6 for RHEL 9	View
54	Red Hat	RHEL-8 based Middleware Containers	View
55	Red Hat	Red Hat build of Apache Camel - HawtIO 4	View
56	Red Hat	Red Hat Data Grid 8	View
57	Red Hat	Red Hat Enterprise Linux 10	View
58	Red Hat	Red Hat Enterprise Linux 8	View
59	Red Hat	Red Hat Enterprise Linux 9	View
60	Red Hat	Red Hat Fuse 7	View
61	Red Hat	Red Hat JBoss Enterprise Application Platform 7	View
62	Red Hat	Red Hat JBoss Enterprise Application Platform 8	View
63	Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	View
64	Red Hat	Red Hat Process Automation 7	View
65	redhat	build of apache camel for spring boot	View
66	redhat	fuse	View
67	redhat	jboss enterprise application platform	View
68	redhat	jboss enterprise application platform	View
69	redhat	jboss enterprise application platform expansion pack	View
70	redhat	process automation	View
71	redhat	single sign-on	View
72	redhat	undertow	View
73	redhat	enterprise linux	View
74	redhat	enterprise linux	View
75	maven	io.undertow:undertow-core	View
76	maven	io.undertow:undertow-core	View
77	maven	io.undertow:undertow-core	View

Total affected vendors: 3|Products: 77

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
7.5	CVSS V31	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD
7.5	CVSS 3.x	—	Vector not published	GitHub Advisory
7.5	CVSS V3_1	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CVE CNA
0.0	CVSS 4.0	—	Vector not published	GitHub Advisory

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

gitlabmaven/io.undertow/undertow-core2.2.38

GitLab Advisory düzeltilmiş sürüm: 2.2.38

gitlabmaven/io.undertow/undertow-core2.3.20

GitLab Advisory düzeltilmiş sürüm: 2.3.20

gitlab

Upgrade to versions 2.2.38, 2.3.20 or above.

canonical

Upgrade to versions 2.2.38, 2.3.20 or above.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Apply the official update named in the evidence only to the matching product and version.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-9784 is associated with the following CWEs:

CWE-770: Allocation of Resources Without Limits or Throttling CWE-404: Common Weakness Enumeration Entry CWE-404 CWE-937: Common Weakness Enumeration Entry CWE-937 CWE-1035: Common Weakness Enumeration Entry CWE-1035

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-9784 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

RHSA-2025:23143vendor-advisory RHSA-2026:0383vendor-advisory RHSA-2026:0384vendor-advisory RHSA-2026:0386vendor-advisory RHSA-2026:33371vendor-advisory RHSA-2026:33372vendor-advisory RHSA-2026:3889vendor-advisory RHSA-2026:3891vendor-advisory RHSA-2026:3892vendor-advisory RHSA-2026:4915vendor-advisory

CVSS Vector Radar Chart

7.5 / 10

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)High

Yama doğrulandı

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

redhat

Red Hat

maven

Weakness Type (CWE & CAPEC)

CWE-770 CWE-404 CWE-937 CWE-1035

Similar Vulnerabilities

9.8

CVE-2024-23897 Actively exploitedjenkins: Arbitrary file read vulnerability through the CLI can lead to RCE

VendorRed Hat Productred_hat_openshift_container_platform_3.11:jenkins+9 etkilenen

Partial patch Public Exploits:10EPSS %1002 y ago

9.8

CVE-2022-22963 Actively exploitedspring-cloud-function: Remote code execution by malicious Spring Expression

VendorRed Hat Product8Base-Openshift-Serverless-1.21:openshift-serverless-1/client-kn-rhel8@sha256:2199a60cb46225b1551c0882fa0694fa846df5d6e3246f7cfbf6ddf5b55f6b5f_ppc64le+9 etkilenen

Patch verified Public Exploits:11EPSS %1004 y ago

9.8

CVE-2023-46604 Actively exploitedactivemq-openwire: OpenWire Module: Unbounded deserialization causes ActiveMQ to be vulnerable to a remote code execution (RCE) attack

VendorRed Hat Productred_hat_jboss_fuse_service_works_6:activemq-openwire+8 etkilenen

Partial patch Public Exploits:9EPSS %1003 y ago

9.8

CVE-2020-16846 Actively exploitedsalt: sending crafted web requests to the Salt API, with the SSH client enabled, can result in shell injection

VendorRed Hat Productred_hat_ceph_storage_2:salt+3 etkilenen

No patch (vendor) Public Exploits:2EPSS %1006 y ago

9.8

CVE-2012-4681 Actively exploitedVulnerability in N/a

Vendorn/a Productn/a+8 etkilenen

Workaround Public Exploits:3EPSS %9914 y ago

9.8

CVE-2012-0507 Actively exploitedVulnerability in N/a

Vendorn/a Productn/a+24 etkilenen

Partial patch Public Exploits:1EPSS %9814 y ago

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free key Documentation

curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2025-9784"