CVE-2026-53917
Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker: Unbounded memory allocation in OpenWire property unmarshalling
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.
INFO
Published Date :
June 30, 2026, 11:16 a.m.
Last Modified :
July 2, 2026, 6:41 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-53917
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Upgrade to Apache ActiveMQ version 6.2.7 or 5.19.8.
- Apply vendor patches when available.
- Validate message sizes before unmarshaling.
- Implement resource limits for message properties.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53917.
| URL | Resource |
|---|---|
| https://lists.apache.org/thread/grrd1mwgkgblqjbwkkq6dvmdxd9ov2dx | Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2026/06/29/14 | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53917 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53917
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53917 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53917 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 02, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:* versions up to (excluding) 5.19.8 *cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:* versions from (including) 6.0.0 up to (excluding) 6.2.7 *cpe:2.3:a:apache:activemq_broker:*:*:*:*:*:*:*:* versions up to (excluding) 5.19.8 *cpe:2.3:a:apache:activemq_broker:*:*:*:*:*:*:*:* versions from (including) 6.0.0 up to (excluding) 6.2.7 Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/grrd1mwgkgblqjbwkkq6dvmdxd9ov2dx Types: Vendor Advisory Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/06/29/14 Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 30, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added SSVC {'id': 'CVE-2026-53917', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-30T14:51:28.341266Z'} -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jun. 30, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/06/29/14 -
New CVE Received by [email protected]
Jun. 30, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Apache Software Foundation', 'product': 'Apache ActiveMQ', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.19.8', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.0.0', 'lessThan': '6.2.7', 'versionType': 'semver'}], 'packageName': 'org.apache.activemq:apache-activemq', 'collectionURL': 'https://repo.maven.apache.org/maven2', 'defaultStatus': 'unaffected'}, {'vendor': 'Apache Software Foundation', 'product': 'Apache ActiveMQ All', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.19.8', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.0.0', 'lessThan': '6.2.7', 'versionType': 'semver'}], 'packageName': 'org.apache.activemq:activemq-all', 'collectionURL': 'https://repo.maven.apache.org/maven2', 'defaultStatus': 'unaffected'}, {'vendor': 'Apache Software Foundation', 'product': 'Apache ActiveMQ Client', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.19.8', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.0.0', 'lessThan': '6.2.7', 'versionType': 'semver'}], 'packageName': 'org.apache.activemq:activemq-client', 'collectionURL': 'https://repo.maven.apache.org/maven2', 'defaultStatus': 'unaffected'}, {'vendor': 'Apache Software Foundation', 'product': 'Apache ActiveMQ Broker', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '5.19.8', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.0.0', 'lessThan': '6.2.7', 'versionType': 'semver'}], 'packageName': 'org.apache.activemq:activemq-broker', 'collectionURL': 'https://repo.maven.apache.org/maven2', 'defaultStatus': 'unaffected'}] Added 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. Added CWE CWE-789 Added Reference https://lists.apache.org/thread/grrd1mwgkgblqjbwkkq6dvmdxd9ov2dx