CVE-2026-50734

HIGH

Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire memory-allocation DoS during wire format negotiation

Title source: cna
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 7.5
EPSS 0.0080
EPSS Percentile 52.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-789
Status published
Products (7)
apache/activemq < 5.19.8
Apache Software Foundation/Apache ActiveMQ < 5.19.8
Apache Software Foundation/Apache ActiveMQ 6.0.0 - 6.2.7
Apache Software Foundation/Apache ActiveMQ All < 5.19.8
Apache Software Foundation/Apache ActiveMQ All 6.0.0 - 6.2.7
Apache Software Foundation/Apache ActiveMQ Client < 5.19.8
Apache Software Foundation/Apache ActiveMQ Client 6.0.0 - 6.2.7
Published Jun 30, 2026
Tracked Since Jun 30, 2026