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high · CVSS 8.8

CVE-2026-86404

Artemis-server: artemis-jms-client: artemis-core-client: undertow-core: wildfly-messaging-activemq-subsystem: artemis messaging handlers in red hat eap permit deserialization by de

Published 7 Sept 2026 · Source updated 1 Nov 2026 · Retrieved 2026-11-01 00:56 UTC

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What happened?

EAP's Artemis deserialization configuration permits deserialization by default. ObjectMessage.getObject() uses ObjectInputStreamWithClassLoader, which implements allow-list/block-list filtering via its checkSecurity()/isTrustedType() method. However, by default both allow-list and block-list are empty. When the allow-list is empty (size == 0), isTrustedType() returns true for ALL classes. This means all classes are deserializable by default.

Description supplied by CVE Program. Formatting is simplified; follow the original advisory for full details.

Affected software and versions

Source-provided software and version information
SoftwareVersion informationFixed version
org.apache.activemq/artemis-serverRed Hatunaffected: 2.40.0.redhat-00024 to < *See vendor advisory
eap8-activemq-artemisRed Hatunaffected: 0:2.40.0-8.redhat_00024.1.el10eap to < *See vendor advisory
eap8-apache-cxfRed Hatunaffected: 0:4.1.7-1.SP1_redhat_00001.1.el10eap to < *See vendor advisory
eap8-artemis-wildfly-integrationRed Hatunaffected: 0:2.0.5-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-bouncycastleRed Hatunaffected: 0:1.85.0-1.redhat_00001.1.el10eap to < *See vendor advisory
eap8-cryptacularRed Hatunaffected: 0:1.2.7-1.redhat_00002.1.el10eap to < *See vendor advisory
eap8-eap-product-conf-parentRed Hatunaffected: 0:801.8.0-1.GA_redhat_00001.1.el10eap to < *See vendor advisory
eap8-hibernateRed Hatunaffected: 0:6.6.54-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-httpcomponents-asyncclientRed Hatunaffected: 0:4.1.5-5.redhat_00008.1.el10eap to < *See vendor advisory
eap8-ironjacamarRed Hatunaffected: 0:3.0.22-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-jackson-annotationsRed Hatunaffected: 0:2.18.9-1.redhat_00003.1.el10eap to < *See vendor advisory
eap8-jackson-coreRed Hatunaffected: 0:2.18.9-1.redhat_00003.1.el10eap to < *See vendor advisory
eap8-jackson-databindRed Hatunaffected: 0:2.18.9-1.redhat_00003.1.el10eap to < *See vendor advisory
eap8-jackson-dataformats-textRed Hatunaffected: 0:2.18.9-1.redhat_00003.1.el10eap to < *See vendor advisory
eap8-jackson-jaxrs-providersRed Hatunaffected: 0:2.18.9-1.redhat_00003.1.el10eap to < *See vendor advisory
eap8-jackson-modules-baseRed Hatunaffected: 0:2.18.9-1.redhat_00003.1.el10eap to < *See vendor advisory
eap8-jackson-modules-java8Red Hatunaffected: 0:2.18.9-1.redhat_00003.1.el10eap to < *See vendor advisory
eap8-jakarta-xml-bind-apiRed Hatunaffected: 0:4.0.5-1.redhat_00001.1.el10eap to < *See vendor advisory
eap8-jaxbRed Hatunaffected: 0:4.0.7-4.redhat_00001.1.el10eap to < *See vendor advisory
eap8-jaxbintrosRed Hatunaffected: 0:2.1.0-1.redhat_00001.1.el10eap to < *See vendor advisory
eap8-jboss-loggingRed Hatunaffected: 0:3.6.3-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-jboss-remotingRed Hatunaffected: 0:5.0.31-1.SP2_redhat_00001.1.el10eap to < *See vendor advisory
eap8-jbossws-apiRed Hatunaffected: 0:3.1.0-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-jbossws-common-toolsRed Hatunaffected: 0:2.2.0-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-jbossws-cxfRed Hatunaffected: 0:7.4.0-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-jbossws-jaxws-undertow-httpspiRed Hatunaffected: 0:3.0.1-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-jbossws-spiRed Hatunaffected: 0:5.1.0-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-jsf-implRed Hatunaffected: 0:4.0.11-2.SP1_redhat_00001.1.el10eap to < *See vendor advisory
eap8-log4jRed Hatunaffected: 0:2.25.4-1.redhat_00003.1.el10eap to < *See vendor advisory
eap8-neethiRed Hatunaffected: 0:3.2.2-1.redhat_00001.1.el10eap to < *See vendor advisory
eap8-nettyRed Hatunaffected: 0:4.1.136-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-netty-transport-native-epollRed Hatunaffected: 0:4.1.136-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-nimbus-jose-jwtRed Hatunaffected: 0:9.37.4-1.redhat_00001.1.el10eap to < *See vendor advisory
eap8-parssonRed Hatunaffected: 0:1.1.9-1.redhat_00001.1.el10eap to < *See vendor advisory
eap8-saaj-implRed Hatunaffected: 0:3.0.6-1.redhat_00001.1.el10eap to < *See vendor advisory
eap8-slf4jRed Hatunaffected: 0:2.0.18-1.redhat_00001.1.el10eap to < *See vendor advisory
eap8-undertowRed Hatunaffected: 0:2.3.26-2.SP3_redhat_00001.1.el10eap to < *See vendor advisory
eap8-wildflyRed Hatunaffected: 0:8.1.8-9.GA_redhat_00006.1.el10eap to < *See vendor advisory
eap8-wildfly-elytronRed Hatunaffected: 0:2.6.11-1.Final_redhat_00001.1.el10eap to < *See vendor advisory
eap8-wildfly-javadocsRed Hatunaffected: 0:8.1.1-12.GA_redhat_00048.1.el10eap to < *See vendor advisory

Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.

Is it being exploited?

This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.

CISA data retrieved 2026-11-01 02:54 UTC. Check CISA ↗

How to respond

  1. Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
  2. Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
  3. Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.

Sources and remediation references

This public advisory does not determine whether a particular server is affected. Records are refreshed as sources change; verify urgent decisions against the original advisory.

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