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CVE-2026-53917— Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker: Unbounded memory allocation in OpenWire property unmarshalling

Quick assessment

Affected
Apache Software Foundation Apache ActiveMQ
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache ActiveMQ是Apache基金会的一款消息队列中间件。 Apache ActiveMQ存在资源管理错误漏洞，该漏洞源于内存分配时存在过大的尺寸值问题，OpenWire消息属性映射在反序列化时未进行大小验证，可能导致已认证用户通过发送特制的OpenWire消息（其中包含map的编码尺寸值过大）触发OOM并使代理崩溃，造成拒绝服务。以下版本受到影响：Apache ActiveMQ 5.19.8之前版本和6.0.0至6.2.7之前版本；Apache ActiveMQ All 5.19.8之前版

AI Predicted 6.5 Difficulty: Easy EPSS 0.74% · P53

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 8

VendorProduct Version RangeStatus
Apache Software Foundation Apache ActiveMQ < 5.19.8 affected
6.0.0< 6.2.7 affected
Apache Software Foundation Apache ActiveMQ All < 5.19.8 affected
6.0.0< 6.2.7 affected
Apache Software Foundation Apache ActiveMQ Broker < 5.19.8 affected
6.0.0< 6.2.7 affected
Apache Software Foundation Apache ActiveMQ Client < 5.19.8 affected
6.0.0< 6.2.7 affected
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I. Basic Information for CVE-2026-53917

Vulnerability Information
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Vulnerability Title
Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker: Unbounded memory allocation in OpenWire property unmarshalling
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
Apache ActiveMQ 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache ActiveMQ是Apache基金会的一款消息队列中间件。 Apache ActiveMQ存在资源管理错误漏洞，该漏洞源于内存分配时存在过大的尺寸值问题，OpenWire消息属性映射在反序列化时未进行大小验证，可能导致已认证用户通过发送特制的OpenWire消息（其中包含map的编码尺寸值过大）触发OOM并使代理崩溃，造成拒绝服务。以下版本受到影响：Apache ActiveMQ 5.19.8之前版本和6.0.0至6.2.7之前版本；Apache ActiveMQ All 5.19.8之前版
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache ActiveMQ 0 ~ 5.19.8 -
Apache Software Foundation Apache ActiveMQ All 0 ~ 5.19.8 -
Apache Software Foundation Apache ActiveMQ Client 0 ~ 5.19.8 -
Apache Software Foundation Apache ActiveMQ Broker 0 ~ 5.19.8 -

II. Public POCs for CVE-2026-53917

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III. Intelligence Information for CVE-2026-53917

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Mailing List Discussions for CVE-2026-53917 (1)

Same Patch Batch · Apache Software Foundation · 2026-06-30 · 10 CVEs total

CVE-2026-54475 Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Temporary destination owners
CVE-2026-53916 Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: Unbounded header buffer in ST
CVE-2026-52760 Apache ActiveMQ, Apache ActiveMQ Web Console: Stored XSS via Unescaped values in ActiveMQ
CVE-2026-50750 Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire
CVE-2026-50734 Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire
CVE-2026-49877 Apache ActiveMQ: Authenticated web users retain admin access by default in the Web Console
CVE-2026-49432 Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: STOMP negative content-length
CVE-2026-49434 Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All: LdapNetworkConnector instant
CVE-2025-53648 Apache Gravitino: SQL misconfiguration can access or truncate files

IV. Related Vulnerabilities

Same product: Apache ActiveMQ
Same vendor: Apache Software Foundation
Same weakness: CWE-789

V. Comments for CVE-2026-53917

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