CVE-2026-53916: CWE-789 Memory Allocation with Excessive Size Value in Apache Software Foundation Apache ActiveMQ
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp. An unauthenticated client that opens a STOMP NIO connection can send header bytes that never terminate which makes the broker buffer them without limit, exhausting the JVM heap. This issue affects 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; Apache ActiveMQ Stomp: 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
CVE-2026-53916 is a CWE-789 vulnerability in Apache ActiveMQ and Apache ActiveMQ Stomp where an unauthenticated client can exploit the STOMP NIO connection by sending never-terminating header bytes. This causes the broker to buffer these bytes indefinitely, leading to JVM heap exhaustion. The affected versions include all releases before 5.19.8 and from 6.0.0 up to but excluding 6.2.7. The vulnerability allows resource exhaustion via excessive memory allocation triggered by malformed input headers.
Potential Impact
The vulnerability can cause denial of service by exhausting the Java Virtual Machine heap memory on the broker, potentially leading to service disruption. Since the attacker can be unauthenticated, this can be triggered remotely without credentials. There is no indication of code execution or data leakage from the provided data.
Mitigation Recommendations
Users should upgrade Apache ActiveMQ to version 5.19.8 or 6.2.7 or later, where this issue is fixed. No other mitigation or temporary workaround is indicated. Patch status is confirmed by the vendor advisory recommending these versions.
CVE-2026-53916: CWE-789 Memory Allocation with Excessive Size Value in Apache Software Foundation Apache ActiveMQ
Description
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp. An unauthenticated client that opens a STOMP NIO connection can send header bytes that never terminate which makes the broker buffer them without limit, exhausting the JVM heap. This issue affects 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; Apache ActiveMQ Stomp: 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.
Affected software
pkg:maven/Apache Software Foundation/org.apache.activemq:apache-activemqpkg:maven/Apache Software Foundation/org.apache.activemq:activemq-allpkg:maven/Apache Software Foundation/org.apache.activemq:activemq-stompRun 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
CVE-2026-53916 is a CWE-789 vulnerability in Apache ActiveMQ and Apache ActiveMQ Stomp where an unauthenticated client can exploit the STOMP NIO connection by sending never-terminating header bytes. This causes the broker to buffer these bytes indefinitely, leading to JVM heap exhaustion. The affected versions include all releases before 5.19.8 and from 6.0.0 up to but excluding 6.2.7. The vulnerability allows resource exhaustion via excessive memory allocation triggered by malformed input headers.
Potential Impact
The vulnerability can cause denial of service by exhausting the Java Virtual Machine heap memory on the broker, potentially leading to service disruption. Since the attacker can be unauthenticated, this can be triggered remotely without credentials. There is no indication of code execution or data leakage from the provided data.
Mitigation Recommendations
Users should upgrade Apache ActiveMQ to version 5.19.8 or 6.2.7 or later, where this issue is fixed. No other mitigation or temporary workaround is indicated. Patch status is confirmed by the vendor advisory recommending these versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-11T14:36:08.703Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a439fbb27e9c797199c07d0
Added to database: 06/30/2026, 10:51:39 UTC
Last enriched: 06/30/2026, 11:06:30 UTC
Last updated: 06/30/2026, 11:51:57 UTC
Views: 6
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