CVE-2026-49434: CWE-20 Improper Input Validation in Apache Software Foundation Apache ActiveMQ Broker
Improper Input Validation vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All. An attacker that has access to publish or modify entries in LDAP that match the configured searchBase and searchFilter can instantiate denied transports inside the broker JVM. This can be used to fetch an attacker URL and spawn a second BrokerService inside the same JVM. This issue affects Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.
AI Analysis
Technical Summary
This vulnerability arises from improper input validation in Apache ActiveMQ Broker's handling of LDAP entries matching configured searchBase and searchFilter. An attacker able to publish or modify such LDAP entries can cause the broker JVM to instantiate denied transports, enabling the fetching of attacker-controlled URLs and spawning a secondary BrokerService within the same JVM process. This affects Apache ActiveMQ Broker versions prior to 5.19.8 and versions from 6.0.0 up to but not including 6.2.7. The vulnerability is tracked as CWE-20 (Improper Input Validation) and has a CVSS v3.1 score of 7.5, indicating high severity.
Potential Impact
An attacker with the ability to publish or modify LDAP entries can exploit this vulnerability to instantiate unauthorized transports and spawn additional BrokerService instances within the same JVM. This can lead to unauthorized code execution or service manipulation within the broker environment. The confidentiality is not impacted, but integrity is highly impacted, and availability is not affected according to the CVSS vector.
Mitigation Recommendations
Users should upgrade Apache ActiveMQ Broker to version 5.19.8 or 6.2.7 or later, as these versions include fixes for this vulnerability. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigations are specified.
CVE-2026-49434: CWE-20 Improper Input Validation in Apache Software Foundation Apache ActiveMQ Broker
Description
Improper Input Validation vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All. An attacker that has access to publish or modify entries in LDAP that match the configured searchBase and searchFilter can instantiate denied transports inside the broker JVM. This can be used to fetch an attacker URL and spawn a second BrokerService inside the same JVM. This issue affects Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.
CVSS v3.1
Score 7.5high
Affected software
pkg:maven/Apache Software Foundation/org.apache.activemq:activemq-brokerpkg:maven/Apache Software Foundation/org.apache.activemq:apache-activemqpkg:maven/Apache Software Foundation/org.apache.activemq:activemq-allRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from improper input validation in Apache ActiveMQ Broker's handling of LDAP entries matching configured searchBase and searchFilter. An attacker able to publish or modify such LDAP entries can cause the broker JVM to instantiate denied transports, enabling the fetching of attacker-controlled URLs and spawning a secondary BrokerService within the same JVM process. This affects Apache ActiveMQ Broker versions prior to 5.19.8 and versions from 6.0.0 up to but not including 6.2.7. The vulnerability is tracked as CWE-20 (Improper Input Validation) and has a CVSS v3.1 score of 7.5, indicating high severity.
Potential Impact
An attacker with the ability to publish or modify LDAP entries can exploit this vulnerability to instantiate unauthorized transports and spawn additional BrokerService instances within the same JVM. This can lead to unauthorized code execution or service manipulation within the broker environment. The confidentiality is not impacted, but integrity is highly impacted, and availability is not affected according to the CVSS vector.
Mitigation Recommendations
Users should upgrade Apache ActiveMQ Broker to version 5.19.8 or 6.2.7 or later, as these versions include fixes for this vulnerability. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-05-29T20:48:53.860Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a439fbb27e9c797199c07c1
Added to database: 06/30/2026, 10:51:39 UTC
Last enriched: 07/07/2026, 12:13:49 UTC
Last updated: 08/09/2026, 00:41:15 UTC
Views: 110
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