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 memory allocation vulnerability in Apache ActiveMQ's STOMP NIO connection handling. An unauthenticated client can send never-terminating header bytes, causing the broker to buffer these bytes indefinitely, leading to JVM heap exhaustion. This affects Apache ActiveMQ versions prior to 5.19.8 and versions from 6.0.0 up to but not including 6.2.7. The vulnerability can cause denial of service due to resource exhaustion.
Potential Impact
The vulnerability allows an unauthenticated attacker to exhaust the JVM heap memory of the Apache ActiveMQ broker by sending malformed STOMP headers that never terminate. This results in denial of service (DoS) conditions, impacting availability. There is no impact on confidentiality or integrity as per the CVSS vector.
Mitigation Recommendations
Users should upgrade Apache ActiveMQ to version 5.19.8 or 6.2.7 or later, where this issue is fixed. Patch status is confirmed by the vendor advisory indicating these versions resolve the vulnerability.
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.
CVSS v3.1
Score 7.5high
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 memory allocation vulnerability in Apache ActiveMQ's STOMP NIO connection handling. An unauthenticated client can send never-terminating header bytes, causing the broker to buffer these bytes indefinitely, leading to JVM heap exhaustion. This affects Apache ActiveMQ versions prior to 5.19.8 and versions from 6.0.0 up to but not including 6.2.7. The vulnerability can cause denial of service due to resource exhaustion.
Potential Impact
The vulnerability allows an unauthenticated attacker to exhaust the JVM heap memory of the Apache ActiveMQ broker by sending malformed STOMP headers that never terminate. This results in denial of service (DoS) conditions, impacting availability. There is no impact on confidentiality or integrity as per the CVSS vector.
Mitigation Recommendations
Users should upgrade Apache ActiveMQ to version 5.19.8 or 6.2.7 or later, where this issue is fixed. Patch status is confirmed by the vendor advisory indicating these versions resolve the vulnerability.
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: 07/07/2026, 11:56:21 UTC
Last updated: 08/13/2026, 00:41:13 UTC
Views: 104
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