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CVE-2026-86404 (GCVE-0-2026-86404)

Vulnerability from cvelistv5 – Published: 2026-09-07 11:35 – Updated: 2026-09-07 13:53
VLAI
Title
Artemis-server: artemis-jms-client: artemis-core-client: undertow-core: wildfly-messaging-activemq-subsystem: artemis messaging handlers in red hat eap permit deserialization by default
Summary
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.
CWE
  • CWE-502 - Deserialization of Untrusted Data
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:53644 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-86404 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2477930 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Unaffected: 0:2.16.0-22.redhat_00057.1.el7eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7
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Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Unaffected: 0:2.3.14-11.SP11_redhat_00001.1.el7eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7
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Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Unaffected: 0:1.5.26-2.Final_redhat_00001.1.el7eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7
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Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Unaffected: 0:2.18.8-1.redhat_00003.1.el7eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7
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Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Unaffected: 0:5.0.31-3.SP2_redhat_00001.1.el7eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7
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Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Unaffected: 0:1.10.0-46.Final_redhat_00044.1.el7eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7
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Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Unaffected: 0:4.1.135-1.Final_redhat_00001.1.el7eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7
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Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Unaffected: 0:2.5.5-30.SP12_redhat_00020.1.el7eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7
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Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Unaffected: 0:2.5.5-24.SP12_redhat_00016.1.el7eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7
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Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Unaffected: 0:2.2.40-2.SP3_redhat_00001.1.el7eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7
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Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 Unaffected: 0:7.4.25-2.GA_redhat_00001.1.el7eap , < * (rpm)
    cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7
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Red Hat Red Hat AMQ Broker 7     cpe:/a:redhat:amq_broker:7
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Red Hat Red Hat build of Apache Camel 4 for Quarkus 3     cpe:/a:redhat:camel_quarkus:3
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Red Hat Red Hat build of Apache Camel for Spring Boot 4     cpe:/a:redhat:camel_spring_boot:4
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Red Hat Red Hat JBoss Enterprise Application Platform 7     cpe:/a:redhat:jboss_enterprise_application_platform:7
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Red Hat Red Hat JBoss Enterprise Application Platform 8     cpe:/a:redhat:jboss_enterprise_application_platform:8
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Date Public
2026-08-11 05:45
Show details on NVD website

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        {
          "lang": "en",
          "time": "2026-05-15T15:34:21.130Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-08-11T05:45:33.075Z",
          "value": "Made public."
        }
      ],
      "title": "Artemis-server: artemis-jms-client: artemis-core-client: undertow-core: wildfly-messaging-activemq-subsystem: artemis messaging handlers in red hat eap permit deserialization by default",
      "workarounds": [
        {
          "lang": "en",
          "value": "Configure a restrictive deserialization-allow-list on every pooled-connection-factory resource. For example, if your MDBs only expect to receive objects of type com.yourapp.OrderEvent, set the allow-list to \"com.yourapp\". This switches ObjectInputStreamWithClassLoader from \"allow everything\" to \"deny by default, allow only listed classes.\" With this in place, even if an attacker injects a malicious ObjectMessage through any vector, the deserialization of gadget chain classes is blocked."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-502: Deserialization of Untrusted Data"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-86404",
    "datePublished": "2026-09-07T11:35:04.324Z",
    "dateReserved": "2026-09-07T11:24:28.229Z",
    "dateUpdated": "2026-09-07T13:53:34.242Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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This means all classes are deserializable by default.\"}],\"affected\":[{\"source\":\"secalert@redhat.com\",\"affectedData\":[{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7\",\"defaultStatus\":\"affected\",\"collectionURL\":\"https://access.redhat.com/downloads/content/package-browser/\",\"packageName\":\"eap7-activemq-artemis\",\"cpes\":[\"cpe:/a:redhat:jboss_enterprise_application_platform_els:7.4::el7\"],\"versions\":[{\"version\":\"0:2.16.0-22.redhat_00057.1.el7eap\",\"lessThan\":\"*\",\"versionType\":\"rpm\",\"status\":\"unaffected\"}]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-09-07T14:31:15+00:00",
      "cve": "CVE-2026-86404",
      "id": "CVE-2026-86404",
      "initial_release_date": "2026-08-11T05:45:33.075000+00:00",
      "product_status:fixed": "101",
      "product_status:known_affected": "10",
      "product_status:known_not_affected": "5",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "artemis-server: artemis-jms-client: artemis-core-client: undertow-core: wildfly-messaging-activemq-subsystem: artemis messaging handlers in Red Hat EAP permit deserialization by default",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-86404.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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