CVE-2026-15565
eap8-activemq-artemis: A flaw was found in Undertow
CVE-2026-15565 is fixed in 41 products on 1 platform, first by RHSA-2026:70230, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.5
important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0102
63rd percentile
A flaw was found in Undertow. A remote attacker can cause Out of Memory on websockets endpoint without authentication on any @ServerEndpoint class that has any @OnMessage method. This allows an attacker to cause Denial of Service attack without authentication and using only a standard WebSocket handshake.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| eap8-activemq-artemis · RHEL 10 | 2.40.0-8.redhat_00024.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-apache-cxf · RHEL 10 | 4.1.7-1.SP1_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-artemis-wildfly-integration · RHEL 10 | 2.0.5-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-bouncycastle · RHEL 10 | 1.85.0-1.redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-cryptacular · RHEL 10 | 1.2.7-1.redhat_00002.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-eap-product-conf-parent · RHEL 10 | 801.8.0-1.GA_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-hibernate · RHEL 10 | 6.6.54-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-httpcomponents-asyncclient · RHEL 10 | 4.1.5-5.redhat_00008.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-ironjacamar · RHEL 10 | 3.0.22-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jackson-annotations · RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jackson-core · RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jackson-databind · RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jackson-dataformats-text · RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jackson-jaxrs-providers · RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jackson-modules-base · RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jackson-modules-java8 · RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jakarta-xml-bind-api · RHEL 10 | 4.0.5-1.redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jaxb · RHEL 10 | 4.0.7-4.redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jaxbintros · RHEL 10 | 2.1.0-1.redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jboss-logging · RHEL 10 | 3.6.3-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jboss-remoting · RHEL 10 | 5.0.31-1.SP2_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jbossws-api · RHEL 10 | 3.1.0-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jbossws-common-tools · RHEL 10 | 2.2.0-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jbossws-cxf · RHEL 10 | 7.4.0-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jbossws-jaxws-undertow-httpspi · RHEL 10 | 3.0.1-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jbossws-spi · RHEL 10 | 5.1.0-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-jsf-impl · RHEL 10 | 4.0.11-2.SP1_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-log4j · RHEL 10 | 2.25.4-1.redhat_00003.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-neethi · RHEL 10 | 3.2.2-1.redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-netty · RHEL 10 | 4.1.136-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-netty-transport-native-epoll · RHEL 10 | 4.1.136-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-nimbus-jose-jwt · RHEL 10 | 9.37.4-1.redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-parsson · RHEL 10 | 1.1.9-1.redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-saaj-impl · RHEL 10 | 3.0.6-1.redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-slf4j · RHEL 10 | 2.0.18-1.redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-undertow · RHEL 10 | 2.3.26-2.SP3_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-wildfly · RHEL 10 | 8.1.8-9.GA_redhat_00006.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-wildfly-elytron · RHEL 10 | 2.6.11-1.Final_redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-wildfly-javadocs · RHEL 10 | 8.1.1-12.GA_redhat_00048.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-ws-commons-XmlSchema · RHEL 10 | 2.3.2-1.redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
| eap8-xml-security · RHEL 10 | 3.0.6-1.redhat_00001.1.el10eap | RHSA-2026:70230 | Sep 23, 2026 |
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