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

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Summary

CVECVE-2026-50750
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-30 11:16:29 UTC
Updated2026-06-30 14:16:27 UTC
DescriptionDenial 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-400 | Denial of Service via Out of Memory | CWE-400 CWE-400 Uncontrolled Resource Consumption

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache ActiveMQ Broker affected 5.19.7 5.19.8 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ Broker affected 6.2.6 6.2.7 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ affected 5.19.7 5.19.8 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ affected 6.2.6 6.2.7 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ All affected 5.19.7 5.19.8 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ All affected 6.2.6 6.2.7 semver Not specified

References

ReferenceSourceLinkTags
lists.apache.org/thread/nhkmbdym61yp6wwy0dny8w1p46sm87kr [email protected] lists.apache.org
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