CVE-2026-53917: 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 Client, Apache ActiveMQ Broker. An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker. 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 Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Broker: 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 (CVE-2026-53917) in Apache ActiveMQ arises from improper validation of the size value in OpenWire message property maps during unmarshaling. An authenticated attacker can exploit this by sending a crafted message with a large encoded size, causing excessive memory allocation that leads to an out-of-memory condition and broker crash (denial of service). The flaw affects Apache ActiveMQ versions prior to 5.19.8 and versions starting from 6.0.0 up to but excluding 6.2.7. The vendor recommends upgrading to version 5.19.8 or 6.2.7 to remediate the issue.
Potential Impact
Successful exploitation results in a denial of service condition by crashing the Apache ActiveMQ broker due to out-of-memory errors triggered by excessive memory allocation. This disrupts message broker availability and can impact dependent applications and services relying on ActiveMQ for messaging.
Mitigation Recommendations
A fix is available by upgrading Apache ActiveMQ to version 5.19.8 or 6.2.7 and later. Users should apply these updates to remediate the vulnerability. No other mitigation or temporary workaround is indicated in the available data.
CVE-2026-53917: 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 Client, Apache ActiveMQ Broker. An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker. 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 Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Broker: 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-clientpkg:maven/Apache Software Foundation/org.apache.activemq:activemq-brokerRun 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 (CVE-2026-53917) in Apache ActiveMQ arises from improper validation of the size value in OpenWire message property maps during unmarshaling. An authenticated attacker can exploit this by sending a crafted message with a large encoded size, causing excessive memory allocation that leads to an out-of-memory condition and broker crash (denial of service). The flaw affects Apache ActiveMQ versions prior to 5.19.8 and versions starting from 6.0.0 up to but excluding 6.2.7. The vendor recommends upgrading to version 5.19.8 or 6.2.7 to remediate the issue.
Potential Impact
Successful exploitation results in a denial of service condition by crashing the Apache ActiveMQ broker due to out-of-memory errors triggered by excessive memory allocation. This disrupts message broker availability and can impact dependent applications and services relying on ActiveMQ for messaging.
Mitigation Recommendations
A fix is available by upgrading Apache ActiveMQ to version 5.19.8 or 6.2.7 and later. Users should apply these updates to remediate the vulnerability. No other mitigation or temporary workaround is indicated in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-11T14:45:46.575Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a439fbb27e9c797199c07d3
Added to database: 06/30/2026, 10:51:39 UTC
Last enriched: 06/30/2026, 11:06:24 UTC
Last updated: 06/30/2026, 11:51:57 UTC
Views: 6
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