CVE-2026-50750

Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire DoS following fix for CVE-2026-49270

State: Published
Severity: 7.5 High
Published: Jun 30, 2026
Updated: Jun 30, 2026
Reserved: Jun 6, 2026

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Description

Denial of Service via Out of Memory vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All.

Following the fix for CVE-2026-49270 an unauthenticated attacker can now cause broker OOM by sending an repeated BrokerInfo commands without sending a ConnectionInfo, until the broker will crash with OOM. This issue affects Apache ActiveMQ Broker: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7; Apache ActiveMQ All: from 5.19.7 before 5.19.8, from 6.2.6 before 6.2.7.

Users are recommended to upgrade to version 6.2.7, which fixes the issue.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
Apache ActiveMQ BrokerApache Software Foundation	5.19.7 to before 5.19.8Affected 6.2.6 to before 6.2.7Affected
Apache ActiveMQApache Software Foundation	5.19.7 to before 5.19.8Affected 6.2.6 to before 6.2.7Affected
Apache ActiveMQ AllApache Software Foundation	5.19.7 to before 5.19.8Affected 6.2.6 to before 6.2.7Affected

References

https://lists.apache.org/thread/nhkmbdym61yp6wwy0dny8w1p46sm87krvendor-advisory

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