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undertow-core: Undertow: Authentication Bypass via AJP ssl_cert/is_ssl Forgery

🗓️ 11 Aug 2026 16:39:22Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 6 Views

Undertow AJP listener honours forged ssl_cert and is_ssl attributes, enabling unauthenticated CLIENT-CERT bypass over TCP port 8009.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7noarcheap7-activemq-artemis2.16.0-22.redhat_00057.1.el7eapeap7-activemq-artemis-2.16.0-22.redhat_00057.1.el7eap.noarch.rpm
Red Hat Enterprise Linux7noarcheap7-activemq-artemis-cli2.16.0-22.redhat_00057.1.el7eapeap7-activemq-artemis-cli-2.16.0-22.redhat_00057.1.el7eap.noarch.rpm
Red Hat Enterprise Linux7noarcheap7-activemq-artemis-commons2.16.0-22.redhat_00057.1.el7eapeap7-activemq-artemis-commons-2.16.0-22.redhat_00057.1.el7eap.noarch.rpm
Red Hat Enterprise Linux7noarcheap7-activemq-artemis-core-client2.16.0-22.redhat_00057.1.el7eapeap7-activemq-artemis-core-client-2.16.0-22.redhat_00057.1.el7eap.noarch.rpm
Red Hat Enterprise Linux7noarcheap7-activemq-artemis-dto2.16.0-22.redhat_00057.1.el7eapeap7-activemq-artemis-dto-2.16.0-22.redhat_00057.1.el7eap.noarch.rpm
Red Hat Enterprise Linux7noarcheap7-activemq-artemis-hornetq-protocol2.16.0-22.redhat_00057.1.el7eapeap7-activemq-artemis-hornetq-protocol-2.16.0-22.redhat_00057.1.el7eap.noarch.rpm
Red Hat Enterprise Linux7noarcheap7-activemq-artemis-hqclient-protocol2.16.0-22.redhat_00057.1.el7eapeap7-activemq-artemis-hqclient-protocol-2.16.0-22.redhat_00057.1.el7eap.noarch.rpm
Red Hat Enterprise Linux7noarcheap7-activemq-artemis-jdbc-store2.16.0-22.redhat_00057.1.el7eapeap7-activemq-artemis-jdbc-store-2.16.0-22.redhat_00057.1.el7eap.noarch.rpm
Red Hat Enterprise Linux7noarcheap7-activemq-artemis-jms-client2.16.0-22.redhat_00057.1.el7eapeap7-activemq-artemis-jms-client-2.16.0-22.redhat_00057.1.el7eap.noarch.rpm
Red Hat Enterprise Linux7noarcheap7-activemq-artemis-jms-server2.16.0-22.redhat_00057.1.el7eapeap7-activemq-artemis-jms-server-2.16.0-22.redhat_00057.1.el7eap.noarch.rpm
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17 Aug 2026 13:40Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.17.4
EPSS0.00222
SSVC
6