Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker: Unbounded memory allocation in OpenWire property unmarshalling

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Summary

CVECVE-2026-53917
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-30 11:16:30 UTC
Updated2026-06-30 15:16:57 UTC
DescriptionMemory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker. An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker. This issue affects 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; Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Broker: 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.

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-789 | CWE-789 CWE-789 Memory Allocation with Excessive Size Value

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 affected 5.19.8 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ affected 6.0.0 6.2.7 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ All affected 5.19.8 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ All affected 6.0.0 6.2.7 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ Client affected 5.19.8 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ Client affected 6.0.0 6.2.7 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ Broker affected 5.19.8 semver Not specified
CNA Apache Software Foundation Apache ActiveMQ Broker affected 6.0.0 6.2.7 semver Not specified

References

ReferenceSourceLinkTags
www.openwall.com/lists/oss-security/2026/06/29/14 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
lists.apache.org/thread/grrd1mwgkgblqjbwkkq6dvmdxd9ov2dx [email protected] lists.apache.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: tonghuaroot (en)

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