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 involves improper validation of the size value in OpenWire message property maps within Apache ActiveMQ. An authenticated attacker can exploit this by sending a specially crafted message with a large encoded size, causing the broker to allocate excessive memory, leading to out-of-memory errors and a crash (denial of service). Affected versions include all versions before 5.19.8 and from 6.0.0 up to but not including 6.2.7. The vendor recommends upgrading to 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. There is no impact on confidentiality or integrity as per the available data. The vulnerability requires authentication and network access to the broker.
Mitigation Recommendations
Users should upgrade Apache ActiveMQ to version 5.19.8 or 6.2.7 where this vulnerability is fixed. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigations or temporary fixes are indicated.
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.
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-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 involves improper validation of the size value in OpenWire message property maps within Apache ActiveMQ. An authenticated attacker can exploit this by sending a specially crafted message with a large encoded size, causing the broker to allocate excessive memory, leading to out-of-memory errors and a crash (denial of service). Affected versions include all versions before 5.19.8 and from 6.0.0 up to but not including 6.2.7. The vendor recommends upgrading to 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. There is no impact on confidentiality or integrity as per the available data. The vulnerability requires authentication and network access to the broker.
Mitigation Recommendations
Users should upgrade Apache ActiveMQ to version 5.19.8 or 6.2.7 where this vulnerability is fixed. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigations or temporary fixes are indicated.
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: 07/07/2026, 11:57:34 UTC
Last updated: 08/13/2026, 00:41:13 UTC
Views: 103
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