CVE-2026-50734
Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire memory-allocation DoS during wire format negotiation
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.
INFO
Published Date :
June 30, 2026, 9:53 a.m.
Last Modified :
June 30, 2026, 9:53 a.m.
Remotely Exploit :
No
Source :
apache
Solution
- Upgrade Apache ActiveMQ to version 5.19.8 or later.
- Upgrade Apache ActiveMQ to version 6.2.7 or later.
- Apply vendor-supplied patches for affected components.
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