{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "Copyright © Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39304.json" } ], "title": "Apache ActiveMQ Client: Apache ActiveMQ Broker: Apache ActiveMQ: Apache ActiveMQ: Denial of Service due to TLSv1.3 KeyUpdate memory exhaustion", "tracking": { "current_release_date": "2026-06-28T07:32:17+00:00", "generator": { "date": "2026-06-28T07:32:17+00:00", "engine": { "name": "Red Hat SDEngine", "version": "5.2.6" } }, "id": 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"full_product_name": { "name": "activemq-client as a component of Red Hat JBoss Enterprise Application Platform 8", "product_id": "red_hat_jboss_enterprise_application_platform_8:activemq-client" }, "product_reference": "activemq-client", "relates_to_product_reference": "red_hat_jboss_enterprise_application_platform_8" }, { "category": "default_component_of", "full_product_name": { "name": "activemq-broker as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack", "product_id": "red_hat_jboss_enterprise_application_platform_expansion_pack:activemq-broker" }, "product_reference": "activemq-broker", "relates_to_product_reference": "red_hat_jboss_enterprise_application_platform_expansion_pack" }, { "category": "default_component_of", "full_product_name": { "name": "activemq-client as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack", "product_id": "red_hat_jboss_enterprise_application_platform_expansion_pack:activemq-client" }, "product_reference": "activemq-client", "relates_to_product_reference": "red_hat_jboss_enterprise_application_platform_expansion_pack" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-39304", "cwe": { "id": "CWE-770", "name": "Allocation of Resources Without Limits or Throttling" }, "discovery_date": "2026-04-10T11:00:59.088622+00:00", "flags": [ { "label": "vulnerable_code_not_in_execute_path", "product_ids": [ "red_hat_amq_broker_7:activemq-broker", "red_hat_amq_broker_7:activemq-client", "red_hat_build_of_apache_camel_for_spring_boot_4:activemq-client" ] }, { "label": "component_not_present", "product_ids": [ "red_hat_data_grid_8:activemq-broker", "red_hat_data_grid_8:activemq-client" ] }, { "label": "vulnerable_code_not_present", "product_ids": [ "red_hat_enterprise_linux_8:log4j", "red_hat_enterprise_linux_8:log4j-jcl", "red_hat_enterprise_linux_8:log4j-slf4j", "red_hat_enterprise_linux_8:log4j-web", "red_hat_enterprise_linux_9:log4j-jcl", "red_hat_enterprise_linux_9:log4j-slf4j", "red_hat_enterprise_linux_9:log4j.src", "red_hat_jboss_enterprise_application_platform_7:activemq-broker", "red_hat_jboss_enterprise_application_platform_7:activemq-client", "red_hat_jboss_enterprise_application_platform_8:activemq-broker", "red_hat_jboss_enterprise_application_platform_8:activemq-client", "red_hat_jboss_enterprise_application_platform_expansion_pack:activemq-broker", "red_hat_jboss_enterprise_application_platform_expansion_pack:activemq-client" ] } ], "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2457275" } ], "notes": [ { "category": "description", "text": "A flaw was found in Apache ActiveMQ Client, Apache ActiveMQ Broker, and Apache ActiveMQ. A remote attacker can exploit this vulnerability by rapidly triggering Transport Layer Security (TLS) version 1.3 handshake KeyUpdates. This improper handling of KeyUpdates causes the broker to exhaust its memory in the SSL engine, leading to a Denial of Service (DoS) condition where the service becomes unavailable.", "title": "Vulnerability description" }, { "category": "summary", "text": "Apache ActiveMQ Client: Apache ActiveMQ Broker: Apache ActiveMQ: Apache ActiveMQ: Denial of Service due to TLSv1.3 KeyUpdate memory exhaustion", "title": "Vulnerability summary" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "known_affected": [ "red_hat_fuse_7:activemq-all", "red_hat_fuse_7:activemq-broker", "red_hat_fuse_7:activemq-client" ], "known_not_affected": [ "red_hat_amq_broker_7:activemq-broker", "red_hat_amq_broker_7:activemq-client", "red_hat_build_of_apache_camel_for_spring_boot_4:activemq-client", "red_hat_data_grid_8:activemq-broker", "red_hat_data_grid_8:activemq-client", "red_hat_enterprise_linux_8:log4j", "red_hat_enterprise_linux_8:log4j-jcl", "red_hat_enterprise_linux_8:log4j-slf4j", "red_hat_enterprise_linux_8:log4j-web", "red_hat_enterprise_linux_9:log4j-jcl", "red_hat_enterprise_linux_9:log4j-slf4j", "red_hat_enterprise_linux_9:log4j.src", "red_hat_jboss_enterprise_application_platform_7:activemq-broker", "red_hat_jboss_enterprise_application_platform_7:activemq-client", "red_hat_jboss_enterprise_application_platform_8:activemq-broker", "red_hat_jboss_enterprise_application_platform_8:activemq-client", "red_hat_jboss_enterprise_application_platform_expansion_pack:activemq-broker", "red_hat_jboss_enterprise_application_platform_expansion_pack:activemq-client" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2026-39304" }, { "category": "external", "summary": "RHBZ#2457275", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2457275" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2026-39304", "url": "https://www.cve.org/CVERecord?id=CVE-2026-39304" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-39304", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39304" }, { "category": "external", "summary": "https://activemq.apache.org/security-advisories.data/CVE-2026-39304-announcement.txt", "url": "https://activemq.apache.org/security-advisories.data/CVE-2026-39304-announcement.txt" } ], "release_date": "2026-04-10T10:54:04.130000+00:00", "remediations": [ { "category": "workaround", "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.", "product_ids": [ "red_hat_fuse_7:activemq-all", "red_hat_fuse_7:activemq-broker", "red_hat_fuse_7:activemq-client" ] }, { "category": "no_fix_planned", "details": "Will not fix", "product_ids": [ "red_hat_fuse_7:activemq-all", "red_hat_fuse_7:activemq-broker", "red_hat_fuse_7:activemq-client" ] } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "products": [ "red_hat_amq_broker_7:activemq-broker", "red_hat_amq_broker_7:activemq-client", "red_hat_build_of_apache_camel_for_spring_boot_4:activemq-client", "red_hat_data_grid_8:activemq-broker", "red_hat_data_grid_8:activemq-client", "red_hat_enterprise_linux_8:log4j", "red_hat_enterprise_linux_8:log4j-jcl", "red_hat_enterprise_linux_8:log4j-slf4j", "red_hat_enterprise_linux_8:log4j-web", "red_hat_enterprise_linux_9:log4j-jcl", "red_hat_enterprise_linux_9:log4j-slf4j", "red_hat_enterprise_linux_9:log4j.src", "red_hat_fuse_7:activemq-all", "red_hat_fuse_7:activemq-broker", "red_hat_fuse_7:activemq-client", "red_hat_jboss_enterprise_application_platform_7:activemq-broker", "red_hat_jboss_enterprise_application_platform_7:activemq-client", "red_hat_jboss_enterprise_application_platform_8:activemq-broker", "red_hat_jboss_enterprise_application_platform_8:activemq-client", "red_hat_jboss_enterprise_application_platform_expansion_pack:activemq-broker", "red_hat_jboss_enterprise_application_platform_expansion_pack:activemq-client" ] } ], "threats": [ { "category": "impact", "details": "Important", "product_ids": [ "red_hat_amq_broker_7:activemq-broker", "red_hat_amq_broker_7:activemq-client", "red_hat_build_of_apache_camel_for_spring_boot_4:activemq-client", "red_hat_data_grid_8:activemq-broker", "red_hat_data_grid_8:activemq-client", "red_hat_enterprise_linux_8:log4j", "red_hat_enterprise_linux_8:log4j-jcl", "red_hat_enterprise_linux_8:log4j-slf4j", "red_hat_enterprise_linux_8:log4j-web", "red_hat_enterprise_linux_9:log4j-jcl", "red_hat_enterprise_linux_9:log4j-slf4j", "red_hat_enterprise_linux_9:log4j.src", "red_hat_fuse_7:activemq-all", "red_hat_fuse_7:activemq-broker", "red_hat_fuse_7:activemq-client", "red_hat_jboss_enterprise_application_platform_7:activemq-broker", "red_hat_jboss_enterprise_application_platform_7:activemq-client", "red_hat_jboss_enterprise_application_platform_8:activemq-broker", "red_hat_jboss_enterprise_application_platform_8:activemq-client", "red_hat_jboss_enterprise_application_platform_expansion_pack:activemq-broker", "red_hat_jboss_enterprise_application_platform_expansion_pack:activemq-client" ] } ], "title": "Apache ActiveMQ Client: Apache ActiveMQ Broker: Apache ActiveMQ: Apache ActiveMQ: Denial of Service due to TLSv1.3 KeyUpdate memory exhaustion" } ] }