A flaw was found in Undertow. A remote attacker could exploit this vulnerability by sending specially crafted WebSocket messages with permessage-deflate negotiated. This could lead to excessive memory consumption due to the PerMessageDeflateFunction.largerBuffer() method using exponential doubling, resulting in a Denial of Service (DoS) for the affected application.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Red Hat Jboss Eap | — | Upgrade Red Hat JBoss EAP to the latest version | Sep 23, 2026 | Jul 4, 2026 |
| Redhat_linux | — | Upgrade eap8-activemq-artemis-jdbc-storeUpgrade eap8-nimbus-jose-jwtUpgrade eap8-jbossws-spiUpgrade eap8-rngomUpgrade eap8-jackson-jaxrs-json-providerUpgrade eap8-hibernate-enversUpgrade eap8-apache-cxf-rtUpgrade eap8-xsomUpgrade eap8-activemq-artemis-journalUpgrade eap8-netty-handlerUpgrade eap8-jackson-annotationsUpgrade eap8-bouncycastleUpgrade eap8-apache-cxf-servicesUpgrade eap8-jackson-modules-java8Upgrade eap8-netty-transportUpgrade eap8-wildfly-elytron-toolUpgrade eap8-jboss-loggingUpgrade eap8-activemq-artemis-selectorUpgrade eap8-ironjacamar-validatorUpgrade eap8-ironjacamar-jdbcUpgrade eap8-jackson-modules-baseUpgrade eap8-bouncycastle-jmailUpgrade eap8-jackson-dataformats-textUpgrade eap8-jbossws-apiUpgrade eap8-ws-commons-XmlSchemaUpgrade eap8-wildfly-java-jdk21Upgrade eap8-jackson-module-jakarta-xmlbind-annotationsUpgrade eap8-netty-codec-socksUpgrade eap8-netty-transport-native-epoll-debuginfoUpgrade eap8-ironjacamar-common-apiUpgrade eap8-bouncycastle-pkixUpgrade eap8-jackson-jaxrs-baseUpgrade eap8-jaxb-jxcUpgrade eap8-jackson-databindUpgrade eap8-codemodelUpgrade eap8-saaj-implUpgrade eap8-parssonUpgrade eap8-jaxb-coreUpgrade eap8-wildfly-elytronUpgrade eap8-jackson-dataformat-yamlUpgrade eap8-ironjacamar-common-spiUpgrade eap8-wildfly-modulesUpgrade eap8-bouncycastle-pgUpgrade eap8-wildflyUpgrade eap8-activemq-artemis-cliUpgrade eap8-hibernate-coreUpgrade eap8-xml-securityUpgrade eap8-netty-transport-classes-epollUpgrade eap8-ironjacamar-core-apiUpgrade eap8-netty-bufferUpgrade eap8-apache-cxfUpgrade eap8-activemq-artemisUpgrade eap8-httpcomponents-asyncclientUpgrade eap8-activemq-artemis-serverUpgrade eap8-jboss-remotingUpgrade eap8-activemq-artemis-hqclient-protocolUpgrade eap8-jsf-implUpgrade eap8-jackson-datatype-jsr310Upgrade eap8-jaxbintrosUpgrade eap8-hibernateUpgrade eap8-jaxb-runtimeUpgrade eap8-bouncycastle-provUpgrade eap8-jbossws-common-toolsUpgrade eap8-activemq-artemis-commonsUpgrade eap8-netty-codecUpgrade eap8-netty-codec-dnsUpgrade eap8-jaxb-xjcUpgrade eap8-wildfly-javadocsUpgrade eap8-eap-product-conf-wildfly-ee-feature-packNo solution existsUpgrade eap8-artemis-wildfly-integrationUpgrade eap8-activemq-artemis-jakarta-clientUpgrade eap8-netty-resolver-dnsUpgrade eap8-ironjacamar-deployers-commonUpgrade eap8-netty-transport-native-epollUpgrade eap8-netty-commonUpgrade eap8-relaxng-datatypeUpgrade eap8-eap-product-conf-parentUpgrade eap8-cryptacularUpgrade eap8-jbossws-cxfUpgrade eap8-activemq-artemis-jakarta-service-extensionsUpgrade eap8-bouncycastle-utilUpgrade eap8-txw2Upgrade eap8-apache-cxf-toolsUpgrade eap8-activemq-artemis-jakarta-raUpgrade eap8-ironjacamar-common-implUpgrade eap8-activemq-artemis-jakarta-serverUpgrade eap8-activemq-artemis-dtoUpgrade eap8-nettyUpgrade eap8-ironjacamar-core-implUpgrade eap8-neethiUpgrade eap8-activemq-artemis-hornetq-protocolUpgrade eap8-activemq-artemis-core-clientUpgrade eap8-ironjacamarUpgrade eap8-slf4j-apiUpgrade eap8-log4jUpgrade eap8-undertowUpgrade eap8-jaxbUpgrade eap8-jackson-datatype-jdk8Upgrade eap8-netty-codec-httpUpgrade eap8-jakarta-xml-bind-apiUpgrade eap8-netty-resolverUpgrade eap8-slf4jUpgrade eap8-netty-transport-native-unix-commonUpgrade eap8-jackson-coreUpgrade eap8-jbossws-jaxws-undertow-httpspiUpgrade eap8-netty-handler-proxy | Aug 31, 2026 | Jul 4, 2026 |
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