CVE-2026-15561— Undertow-core: oom via missing limits in chunked trailer in eap's undertow
Quick assessment
Affected
Red Hat Red Hat JBoss Enterprise Application Platform 7.4.25
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Undertow是美国Undertow社区开源的一个用 Java 编写的灵活、高性能的 Web 服务器。 Undertow存在资源管理错误漏洞，该漏洞源于undertow http/1.1 chunked-transfer解码器缺少大小和数量限制，可能导致未经身份验证的攻击者使用未认证连接使JVM内存不足，停止监听器上的所有部署，导致拒绝服务。
Possible ATT&CK Techniques 2 AI
T1498 · Network Denial of Service T1499 · Endpoint Denial of ServiceAffected Version Matrix 177
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 | any |
affected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 | 0:2.16.0-22.redhat_00057.1.el7eap< * |
unaffected |
0:2.3.14-11.SP11_redhat_00001.1.el7eap< * |
unaffected | ||
0:1.5.26-2.Final_redhat_00001.1.el7eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el7eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el7eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el7eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el7eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el7eap< * |
unaffected | ||
| … +9 more rows | |||
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8 | 0:2.16.0-22.redhat_00057.1.el8eap< * |
unaffected |
0:2.3.14-11.SP11_redhat_00001.1.el8eap< * |
unaffected | ||
0:1.5.26-2.Final_redhat_00001.1.el8eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el8eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el8eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el8eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el8eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el8eap< * |
unaffected | ||
| … +9 more rows | |||
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9 | 0:2.16.0-22.redhat_00057.1.el9eap< * |
unaffected |
0:2.3.14-11.SP11_redhat_00001.1.el9eap< * |
unaffected | ||
0:1.5.26-2.Final_redhat_00001.1.el9eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el9eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el9eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el9eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el9eap< * |
unaffected | ||
0:2.18.8-1.redhat_00003.1.el9eap< * |
unaffected | ||
| … +9 more rows | |||
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4.25 | 2.2.40.SP3-redhat-00001< * |
unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.40.0-8.redhat_00024.1.el10eap< * |
unaffected |
0:4.1.7-1.SP1_redhat_00001.1.el10eap< * |
unaffected | ||
0:2.0.5-1.Final_redhat_00001.1.el10eap< * |
unaffected | ||
0:1.85.0-1.redhat_00001.1.el10eap< * |
unaffected | ||
0:1.2.7-1.redhat_00002.1.el10eap< * |
unaffected | ||
0:801.8.0-1.GA_redhat_00001.1.el10eap< * |
unaffected | ||
0:6.6.54-1.Final_redhat_00001.1.el10eap< * |
unaffected | ||
0:4.1.5-5.redhat_00008.1.el10eap< * |
unaffected | ||
| … +33 more rows | |||
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.40.0-8.redhat_00024.1.el8eap< * |
unaffected |
0:4.1.7-1.SP1_redhat_00001.1.el8eap< * |
unaffected | ||
0:2.0.5-1.Final_redhat_00001.1.el8eap< * |
unaffected | ||
0:1.85.0-1.redhat_00001.1.el8eap< * |
unaffected | ||
0:1.2.7-1.redhat_00002.1.el8eap< * |
unaffected | ||
0:801.8.0-1.GA_redhat_00001.1.el8eap< * |
unaffected | ||
0:6.6.54-1.Final_redhat_00001.1.el8eap< * |
unaffected | ||
0:4.1.5-5.redhat_00008.1.el8eap< * |
unaffected | ||
| … +33 more rows | |||
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.40.0-8.redhat_00024.1.el9eap< * |
unaffected |
0:4.1.7-1.SP1_redhat_00001.1.el9eap< * |
unaffected | ||
0:2.0.5-1.Final_redhat_00001.1.el9eap< * |
unaffected | ||
0:1.85.0-1.redhat_00001.1.el9eap< * |
unaffected | ||
0:1.2.7-1.redhat_00002.1.el9eap< * |
unaffected | ||
0:801.8.0-1.GA_redhat_00001.1.el9eap< * |
unaffected | ||
0:6.6.54-1.Final_redhat_00001.1.el9eap< * |
unaffected | ||
0:4.1.5-5.redhat_00008.1.el9eap< * |
unaffected | ||
| … +33 more rows | |||
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | any |
unaffected |
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I. Basic Information for CVE-2026-15561
Vulnerability Information
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Vulnerability Title
Undertow-core: oom via missing limits in chunked trailer in eap's undertow
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in EAP's undertow http/1.1 chunked-transfer decoder. missing limits on size and count would allow an attacker to use an unauthenticated connection to drive the JVM to an OutOfMemory error, stopping all deployments on the listener, and achieving Denial of Service.
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
Undertow 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Undertow是美国Undertow社区开源的一个用 Java 编写的灵活、高性能的 Web 服务器。 Undertow存在资源管理错误漏洞，该漏洞源于undertow http/1.1 chunked-transfer解码器缺少大小和数量限制，可能导致未经身份验证的攻击者使用未认证连接使JVM内存不足，停止监听器上的所有部署，导致拒绝服务。
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 | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4.25 | 2.2.40.SP3-redhat-00001 ~ * |
cpe:/a:redhat:jboss_enterprise_application_platform:7.4
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 | 0:2.16.0-22.redhat_00057.1.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 | 0:2.3.14-11.SP11_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 | 0:1.5.26-2.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:5.0.31-3.SP2_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 | 0:1.10.0-46.Final_redhat_00044.1.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 | 0:4.1.135-1.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 | 0:4.1.135-1.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 | 0:2.5.5-30.SP12_redhat_00020.1.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 | 0:2.5.5-24.SP12_redhat_00016.1.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 | 0:2.2.40-2.SP3_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 | 0:7.4.25-2.GA_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 8 | 0:2.16.0-22.redhat_00057.1.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 | 0:2.3.14-11.SP11_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 | 0:1.5.26-2.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:2.18.8-1.redhat_00003.1.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 | 0:5.0.31-3.SP2_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 | 0:1.10.0-46.Final_redhat_00044.1.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 | 0:4.1.135-1.Final_redhat_00001.1.el8eap ~ * |
cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el8
|
|
II. Public POCs for CVE-2026-15561
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-15561
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Vendor Advisories for CVE-2026-15561 (10)
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🔗 2483133 – (CVE-2026-15561) CVE-2026-15561 undertow-core: OOM via missing limits in chunked trailer in EAP's Undertow Read full article issue-tracking x_refsource_REDHAT
-
-
-
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🔗 RHSA-2026:53646 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
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🔗 RHSA-2026:53645 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:70230 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:53644 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
Same Patch Batch · Red Hat · 2026-08-11 · 29 CVEs total
| CVE-2026-10579 | 9.8 CRITICAL | Picketlink-federation: auth bypass in picketlink saml unsolicited-response |
| CVE-2026-19546 | 8.8 HIGH | Dbi: incomplete fix for cve-2026-14380 dbi: arbitrary code execution via caller-influenced |
| CVE-2026-15555 | 8.8 HIGH | Jboss-marshalling-river: wildfly-clustering-infinispan-marshalling: jboss deserialization |
| CVE-2026-19550 | 8.2 HIGH | Freeipa: ipa: freeipa: trust-fetch-domains uses trust-read aci to gate a privileged ad tru |
| CVE-2026-15556 | 8.1 HIGH | Picketlink-federation: picketlink saml 2.0 auth bypass via missing assertions |
| CVE-2026-15560 | 8.1 HIGH | Openjdk-orb: unauthed class loading via iiop in eap |
| CVE-2026-72693 | 7.8 HIGH | Kbd: local privilege escalation in openvt via incorrect process owner verification allowin |
| CVE-2026-15567 | 7.5 HIGH | Wildfly: wildfly-iiop: wildfly-jacorb: wildfly: pre-auth denial of service on the iiop lis |
| CVE-2026-71467 | 7.5 HIGH | Acm-search-v2-api-rhel9: search-v2-api: authentication bypass on /federated via upgrade: w |
| CVE-2026-71217 | 7.5 HIGH | Iperf3: iperf3 server accepts unbounded peer-controlled json parameters enabling remote de |
| CVE-2026-15565 | 7.5 HIGH | Undertow: undertow-websockets: undertow: pre-auth dos on websocket endpoint with @serveren |
| CVE-2026-15562 | 7.5 HIGH | Jboss-remoting: jboss-remoting: integer overflow in messagereader leads to pre-authenticat |
| CVE-2026-15563 | 7.4 HIGH | Wildfly-iiop-openjdk: missing authentication on eap's iiop nameservice leads to mitm or do |
| CVE-2026-15554 | 7.4 HIGH | Undertow-core: undertow: authentication bypass via ajp ssl_cert/is_ssl forgery |
| CVE-2026-50237 | 7.4 HIGH | Openshift/console: namespace tenant ssrf with egress bypass, catalog poisoning, and admin- |
| CVE-2026-50236 | 7.4 HIGH | Openshift/console: authenticated ssrf with full response reflection and path neutralizatio |
| CVE-2026-72694 | 7.1 HIGH | Mrtg: mrtg daemon symlink-following chown allows local privilege escalation via pid file p |
| CVE-2026-71474 | 7.1 HIGH | Insights-client-rhel9: insights-client: pull-secret bearer token written to logs on non-20 |
| CVE-2026-71475 | 6.8 MEDIUM | Insights-client-rhel9: insights-client: spoke-controlled clusterid injected unencoded into |
| CVE-2026-24330 | 6.5 MEDIUM | Wildfly-core: wildfly: arbitrary file read via malicious archive deployment |
Showing top 20 of 29 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-15561
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