CVE-2026-49434

A flaw was found in Apache ActiveMQ. An attacker with privileges to publish or modify entries in Lightweight Directory Access Protocol (LDAP) can exploit an improper input validation vulnerability. This allows the attacker to instantiate denied transports within the broker's Java Virtual Machine (JVM). Consequently, this can be used to fetch an attacker-controlled URL and launch an additional BrokerService within the same JVM, potentially leading to a denial of service or further system compromise.

Red Hat products ship Apache ActiveMQ Classic components as transitive dependencies. The vulnerability is in the LdapNetworkConnector feature specific to Classic ActiveMQ, which allows an attacker with LDAP write access to instantiate denied transports and spawn a rogue broker. This feature is not configured or used in any Red Hat product deployment. Red Hat AMQ Broker is based on Apache ActiveMQ Artemis, a separate codebase that does not include the LdapNetworkConnector.

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.

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.