Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1.8.GA | — | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | — | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | — | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | — | — |
| Red Hat | Red Hat AMQ Broker 7 | — | — |
| Red Hat | Red Hat build of Apache Camel 4 for Quarkus 3 | — | — |
| Red Hat | Red Hat build of Apache Camel for Spring Boot 4 | — | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 | — | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-activemq-artemis +15 | 2.16.0-22.redhat_00057.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-glassfish-jsf | 2.3.14-11.SP11_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-ironjacamar +8 | 1.5.26-2.Final_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-jackson-core +10 | 2.18.8-1.redhat_00003.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-jboss-remoting | 5.0.31-3.SP2_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-jboss-server-migration +2 | 1.10.0-46.Final_redhat_00044.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-netty +26 | 4.1.135-1.Final_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-picketlink-api +7 | 2.5.5-24.SP12_redhat_00016.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-picketlink-bindings +1 | 2.5.5-30.SP12_redhat_00020.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-undertow | 2.2.40-1.SP3_redhat_00001.1.el8eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-wildfly +4 | 7.4.25-2.GA_redhat_00001.1.el7eap | RHSA-2026:53646, RHSA-2026:53645, RHSA-2026:53644 |
| Red Hat Jboss Enterprise Application Platform Els 7 | eap7-wildfly-java-jdk17 | 7.4.25-2.GA_redhat_00001.1.el8eap | RHSA-2026:53646, RHSA-2026:53645 |
| Red Hat JBoss EAP 8 | eap8-activemq-artemis +14 | 2.40.0-8.redhat_00024.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-apache-cxf +3 | 4.1.7-1.SP1_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-artemis-wildfly-integration | 2.0.5-1.Final_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-bouncycastle +5 | 1.85.0-1.redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-cryptacular | 1.2.7-1.redhat_00002.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-eap-product-conf-parent +1 | 801.8.0-1.GA_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-hibernate +2 | 6.6.54-1.Final_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-httpcomponents-asyncclient | 4.1.5-5.redhat_00008.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-ironjacamar +8 | 3.0.22-1.Final_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jackson-core +12 | 2.18.9-1.redhat_00003.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jakarta-xml-bind-api | 4.0.5-1.redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jaxb +9 | 4.0.7-4.redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jaxbintros | 2.1.0-1.redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jboss-logging | 3.6.3-1.Final_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jboss-remoting | 5.0.31-1.SP2_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jbossws-api | 3.1.0-1.Final_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jbossws-common-tools | 2.2.0-1.Final_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jbossws-cxf | 7.4.0-1.Final_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jbossws-jaxws-undertow-httpspi | 3.0.1-1.Final_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jbossws-spi | 5.1.0-1.Final_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-jsf-impl | 4.0.11-2.SP1_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-log4j | 2.25.4-1.redhat_00003.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-neethi | 3.2.2-1.redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-netty +14 | 4.1.136-1.Final_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-nimbus-jose-jwt | 9.37.4-1.redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-parsson | 1.1.9-1.redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-saaj-impl +1 | 3.0.6-1.redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-slf4j +1 | 2.0.18-1.redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-undertow | 2.3.26-2.SP3_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-wildfly +3 | 8.1.8-9.GA_redhat_00006.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-wildfly-elytron +1 | 2.6.11-1.Final_redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-wildfly-javadocs | 8.1.1-12.GA_redhat_00048.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
| Red Hat JBoss EAP 8 | eap8-ws-commons-XmlSchema | 2.3.2-1.redhat_00001.1.el8eap | RHSA-2026:70230, RHSA-2026:70229, RHSA-2026:70228 |
Advisories 6
- RHSA-2026:70230 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.8 security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:70229 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.8 security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:70228 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.8 security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:53646 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 Security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:53645 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 Security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:53644 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 security pdate Red Hat Security Advisories (RHSA) · Oct 20, 2026
References
- RHSA-2026:70228 vendor-advisory
- RHSA-2026:70229 vendor-advisory
- RHSA-2026:70230 vendor-advisory
- RHSA-2026:70277 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-86404 vdb-entry
- RHBZ#2477930 issue-tracking