CVE-2026-50734— Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire memory-allocation DoS during wire format negotiation
Quick assessment
Affected
Apache Software Foundation Apache ActiveMQ Client
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 Client、Apache ActiveMQ和Apache ActiveMQ All存在资源管理错误漏洞，该漏洞源于内存分配大小值过大，导致未经身份验证的网络攻击者通过发送特制的WireFormatInfo帧，触发代理在预认证协商期间尝试分配内存，引起内存溢出并崩溃。以下版本受到影响：Apache ActiveMQ Client 5.19.8之前版本和6.0.0至6.2.7之前版本；Apache Ac
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1499 · Endpoint Denial of ServiceAffected Version Matrix 6
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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 Client | < 5.19.8 |
affected |
6.0.0< 6.2.7 |
affected |
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I. Basic Information for CVE-2026-50734
Vulnerability Information
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Vulnerability Title
Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire memory-allocation DoS during wire format negotiation
Source: CVE Program / CVE List V5
Vulnerability Description
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All.
An unauthenticated network attacker can cause a broker DoS by sending a crafted WireFormatInfo frame with a malicious large size value. The value is not validate and causes the broker to attempt allocation during pre-auth negotiation which can trigger OOM and crash the broker.
This issue affects Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; 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.
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 Client、Apache ActiveMQ和Apache ActiveMQ All存在资源管理错误漏洞，该漏洞源于内存分配大小值过大，导致未经身份验证的网络攻击者通过发送特制的WireFormatInfo帧，触发代理在预认证协商期间尝试分配内存，引起内存溢出并崩溃。以下版本受到影响：Apache ActiveMQ Client 5.19.8之前版本和6.0.0至6.2.7之前版本；Apache Ac
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 Client | 0 ~ 5.19.8 | - |
|
| Apache Software Foundation | Apache ActiveMQ | 0 ~ 5.19.8 | - |
|
| Apache Software Foundation | Apache ActiveMQ All | 0 ~ 5.19.8 | - |
|
II. Public POCs for CVE-2026-50734
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2026-50734 (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-2026-53917 | Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker: Unbo | |
| 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-2026-49877 | 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 |
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