CVE-2025-9784— Undertow: undertow madeyoureset http/2 ddos vulnerability

CVSS 7.5 · High EPSS 2.17% · P80 Updated Jul 27, 2026

Possible ATT&CK Techniques 2AI

T1498 · Network Denial of Service T1499 · Endpoint Denial of Service

Affected Version Matrix 62

Vendor	Product	Version Range	Status
None	None	`< 2.2.38.Final`	affected
Red Hat	Red Hat build of Apache Camel - HawtIO 4	`any`	unaffected
Red Hat	Red Hat build of Apache Camel 4.14.2 for Spring Boot 3.5.8	`any`	unaffected
Red Hat	Red Hat Data Grid 8	`any`	affected
Red Hat	Red Hat Enterprise Linux 10	`any`	unaffected
Red Hat	Red Hat Enterprise Linux 8	`any`	unaffected
		`any`	unaffected
Red Hat	Red Hat Enterprise Linux 9	`any`	unaffected
Red Hat	Red Hat Fuse 7	`any`	affected
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	`0:1.4.18-21.SP19_redhat_00001.1.ep7.el7< *`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	`0:2.0.41-8.SP9_redhat_00001.1.el7eap< *`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4	`any`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7	`0:2.2.39-1.Final_redhat_00001.1.el7eap< *`	unaffected
		`0:7.4.24-4.GA_redhat_00002.1.el7eap< *`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8	`0:2.2.39-1.Final_redhat_00001.1.el8eap< *`	unaffected
		`0:7.4.24-4.GA_redhat_00002.1.el8eap< *`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9	`0:2.2.39-1.Final_redhat_00001.1.el9eap< *`	unaffected
		`0:7.4.24-4.GA_redhat_00002.1.el9eap< *`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 8	`any`	unaffected
		`any`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0	`any`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	`0:1.83.0-1.redhat_00001.1.el8eap< *`	unaffected
		`0:33.0.0-2.jre_redhat_00003.1.el8eap< *`	unaffected
		`0:4.0.6-1.redhat_00001.1.el8eap< *`	unaffected
		`0:1.0.0-3.redhat_00009.1.el8eap< *`	unaffected
		`0:2.0.2-1.Final_redhat_00001.1.el8eap< *`	unaffected
		`0:2.3.23-1.SP3_redhat_00001.1.el8eap< *`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	`0:1.83.0-1.redhat_00001.1.el9eap< *`	unaffected
		`0:33.0.0-2.jre_redhat_00003.1.el9eap< *`	unaffected
		`0:4.0.6-1.redhat_00001.1.el9eap< *`	unaffected
		`0:1.0.0-3.redhat_00009.1.el9eap< *`	unaffected
		`0:2.0.2-1.Final_redhat_00001.1.el9eap< *`	unaffected
		`0:2.3.23-1.SP3_redhat_00001.1.el9eap< *`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1	`any`	unaffected
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	`0:4.0.10-1.redhat_00001.1.el8eap< *`	unaffected
		`0:1.82.0-1.redhat_00001.1.el8eap< *`	unaffected
		`0:801.3.0-1.GA_redhat_00001.1.el8eap< *`	unaffected
		`0:1.0.1-3.redhat_00003.1.el8eap< *`	unaffected
		`0:6.6.36-1.Final_redhat_00001.1.el8eap< *`	unaffected
		`0:4.0.2-1.Final_redhat_00001.1.el8eap< *`	unaffected
		`0:2.5.0-1.redhat_00001.1.el8eap< *`	unaffected
		`0:2.3.20-2.SP4_redhat_00001.1.el8eap< *`	unaffected
… +4 more rows
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	`0:4.0.10-1.redhat_00001.1.el9eap< *`	unaffected
		`0:1.82.0-1.redhat_00001.1.el9eap< *`	unaffected
		`0:801.3.0-1.GA_redhat_00001.1.el9eap< *`	unaffected
		`0:1.0.1-3.redhat_00003.1.el9eap< *`	unaffected
		`0:6.6.36-1.Final_redhat_00001.1.el9eap< *`	unaffected
		`0:4.0.2-1.Final_redhat_00001.1.el9eap< *`	unaffected
		`0:2.5.0-1.redhat_00001.1.el9eap< *`	unaffected
		`0:2.3.20-2.SP4_redhat_00001.1.el9eap< *`	unaffected
… +4 more rows
Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	`any`	affected
		`any`	unaffected
Red Hat	Red Hat Process Automation 7	`any`	affected
Red Hat	Red Hat Single Sign-On 7	`any`	affected

I. Basic Information for CVE-2025-9784

Vulnerability Information

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Vulnerability Title

Undertow: undertow madeyoureset http/2 ddos vulnerability

Source: CVE Program / CVE List V5

Vulnerability 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).

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

不加限制或调节的资源分配

Source: CVE Program / CVE List V5

Vulnerability Title

Red Hat Undertow 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Red Hat Undertow是美国红帽（Red Hat）公司的一款基于Java的嵌入式Web服务器，是Wildfly（Java应用服务器）默认的Web服务器。 Red Hat Undertow存在安全漏洞，该漏洞源于容易受到HTTP/2 DDoS攻击。

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE
-	-	0 ~ 2.2.38.Final	-
Red Hat	Red Hat build of Apache Camel 4.14.2 for Spring Boot 3.5.8	-	`cpe:/a:redhat:apache_camel_spring_boot:4.14`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	0:1.4.18-21.SP19_redhat_00001.1.ep7.el7 ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	0:2.0.41-8.SP9_redhat_00001.1.el7eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4	-	`cpe:/a:redhat:jboss_enterprise_application_platform:7.4`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7	0:2.2.39-1.Final_redhat_00001.1.el7eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7	0:7.4.24-4.GA_redhat_00002.1.el7eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8	0:2.2.39-1.Final_redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8	0:7.4.24-4.GA_redhat_00002.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9	0:2.2.39-1.Final_redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9	0:7.4.24-4.GA_redhat_00002.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0	-	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	0:1.83.0-1.redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	0:33.0.0-2.jre_redhat_00003.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	0:4.0.6-1.redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	0:1.0.0-3.redhat_00009.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	0:2.0.2-1.Final_redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	0:2.3.23-1.SP3_redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	0:1.83.0-1.redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	0:33.0.0-2.jre_redhat_00003.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	0:4.0.6-1.redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	0:1.0.0-3.redhat_00009.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	0:2.0.2-1.Final_redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	0:2.3.23-1.SP3_redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.0::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1	-	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:4.0.10-1.redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:1.82.0-1.redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:801.3.0-1.GA_redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:1.0.1-3.redhat_00003.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:6.6.36-1.Final_redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:4.0.2-1.Final_redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:2.5.0-1.redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:2.3.20-2.SP4_redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:8.1.3-4.GA_redhat_00006.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:5.0.12-1.Final_redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:2.6.6-1.Final_redhat_00001.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	0:8.1.1-4.GA_redhat_00007.1.el8eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:4.0.10-1.redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:1.82.0-1.redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:801.3.0-1.GA_redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:1.0.1-3.redhat_00003.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:6.6.36-1.Final_redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:4.0.2-1.Final_redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:2.5.0-1.redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:2.3.20-2.SP4_redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:8.1.3-4.GA_redhat_00006.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:5.0.12-1.Final_redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:2.6.6-1.Final_redhat_00001.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9	0:8.1.1-4.GA_redhat_00007.1.el9eap ~ *	`cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9`
Red Hat	Red Hat build of Apache Camel - HawtIO 4	-	`cpe:/a:redhat:apache_camel_hawtio:4`
Red Hat	Red Hat Data Grid 8	-	`cpe:/a:redhat:jboss_data_grid:8`
Red Hat	Red Hat Enterprise Linux 10	-	`cpe:/o:redhat:enterprise_linux:10`
Red Hat	Red Hat Enterprise Linux 8	-	`cpe:/o:redhat:enterprise_linux:8`
Red Hat	Red Hat Enterprise Linux 8	-	`cpe:/o:redhat:enterprise_linux:8`
Red Hat	Red Hat Enterprise Linux 9	-	`cpe:/o:redhat:enterprise_linux:9`
Red Hat	Red Hat Fuse 7	-	`cpe:/a:redhat:jboss_fuse:7`
Red Hat	Red Hat JBoss Enterprise Application Platform 8	-	`cpe:/a:redhat:jboss_enterprise_application_platform:8`
Red Hat	Red Hat JBoss Enterprise Application Platform 8	-	`cpe:/a:redhat:jboss_enterprise_application_platform:8`
Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	-	`cpe:/a:redhat:jbosseapxp`
Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	-	`cpe:/a:redhat:jbosseapxp`
Red Hat	Red Hat Process Automation 7	-	`cpe:/a:redhat:jboss_enterprise_bpms_platform:7`
Red Hat	Red Hat Single Sign-On 7	-	`cpe:/a:redhat:red_hat_single_sign_on:7`

II. Public POCs for CVE-2025-9784

#	POC Description	Source Link	Shenlong Link
1	None	https://github.com/drackyjr/CVE-2025-9784	POC Details

AI-Generated POCPremium

Qwen3.6-35B-A3B · 8806 chars

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III. Intelligence Information for CVE-2025-9784

请登录查看更多情报信息。

Vendor Advisories for CVE-2025-9784 (14)

🔗 CVE-2025-9784 - Red Hat Customer Portalvdb-entryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:4917vendor-advisoryx_refsource_REDHAT
RHSA-2026:4915 - Security Advisory - Red Hat Customer Portalvendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0383vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3891vendor-advisoryx_refsource_REDHAT
RHSA-2026:4916 - Security Advisory - Red Hat Customer Portalvendor-advisoryx_refsource_REDHAT
RHSA-2026:4924 - Security Advisory - Red Hat Customer Portalvendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3889vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3892vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0386vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0384vendor-advisoryx_refsource_REDHAT
🔗 RHSA-2026:33371 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:23143vendor-advisoryx_refsource_REDHAT
🔗 RHSA-2026:33372 - Security Advisory - Red Hat Customer Portalvendor-advisoryx_refsource_REDHAT

https://www.cve.org/CVERecord?id=CVE-2025-9784

IV. Related Vulnerabilities

Same weakness: CWE-770

V. Comments for CVE-2025-9784

No comments yet

Goal Reached Thanks to every supporter — we hit 100%!

CVE-2025-9784— Undertow: undertow madeyoureset http/2 ddos vulnerability

Possible ATT&CK Techniques 2AI

Affected Version Matrix 62

I. Basic Information for CVE-2025-9784

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2025-9784

III. Intelligence Information for CVE-2025-9784

Vendor Advisories for CVE-2025-9784 (14)

IV. Related Vulnerabilities

V. Comments for CVE-2025-9784

Leave a comment