TI-2026-28889 Aliases CVE-2026-40046 GHSA-xvqc-pp94-fmpx

Integer overflow in Apache ActiveMQ

LOW 39CWE-190Published 2026-04-09 · Updated 2026-04-10

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-190 and the CVSS impact.

Summary

Integer Overflow or Wraparound vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT. The fix for "CVE-2025-66168: MQTT control packet remaining length field is not properly validated" was only applied to 5.19.2 (and future 5.19.x) releases but was missed for all 6.0.0+ versions. This issue affects Apache ActiveMQ: from 6.0.0 before 6.2.4; Apache ActiveMQ All: from 6.0.0 before 6.2.4; Apache ActiveMQ MQTT: from 6.0.0 before 6.2.4. Users are recommended to upgrade to version 6.2.4 or a 5.19.x version starting with 5.19.2 or later (currently latest is 5.19.5), which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00381 32nd percentileScored 2026-11-07

Fix Fixed Apache ActiveMQ (Apache Software Foundation): 6.2.4Apache ActiveMQ All (Apache Software Foundation): 6.2.4+4 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Apache	Apache ActiveMQ	6.0.0 to before 6.2.4	6.2.4	Patch available	CNA
Apache	Apache ActiveMQ All	6.0.0 to before 6.2.4	6.2.4	Patch available	CNA
Apache	Apache ActiveMQ MQTT	6.0.0 to before 6.2.4	6.2.4	Patch available	CNA
—	org.apache.activemq:apache-activemq (Maven)	6.0.0 to before 6.2.4	6.2.4	Patch available	GHSA-xvqc-pp94-fmpx
—	org.apache.activemq:activemq-all (Maven)	6.0.0 to before 6.2.4	6.2.4	Patch available	GHSA-xvqc-pp94-fmpx
—	org.apache.activemq:activemq-mqtt (Maven)	6.0.0 to before 6.2.4	6.2.4	Patch available	GHSA-xvqc-pp94-fmpx

Apache ActiveMQ VendorApache Affected 6.0.0 to before 6.2.4 Fixed in 6.2.4 Patch available CNA
Apache ActiveMQ All VendorApache Affected 6.0.0 to before 6.2.4 Fixed in 6.2.4 Patch available CNA
Apache ActiveMQ MQTT VendorApache Affected 6.0.0 to before 6.2.4 Fixed in 6.2.4 Patch available CNA
org.apache.activemq:apache-activemq (Maven) Vendor— Affected 6.0.0 to before 6.2.4 Fixed in 6.2.4 Patch available GHSA-xvqc-pp94-fmpx
org.apache.activemq:activemq-all (Maven) Vendor— Affected 6.0.0 to before 6.2.4 Fixed in 6.2.4 Patch available GHSA-xvqc-pp94-fmpx
org.apache.activemq:activemq-mqtt (Maven) Vendor— Affected 6.0.0 to before 6.2.4 Fixed in 6.2.4 Patch available GHSA-xvqc-pp94-fmpx

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:apache:activemq::::::::	—	—	Apache

cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:* Versions — — ·Apache

Remediation

Fix · CNA Apache ActiveMQ (Apache Software Foundation) Fixed in 6.2.4
Fix · CNA Apache ActiveMQ All (Apache Software Foundation) Fixed in 6.2.4
Fix · CNA Apache ActiveMQ MQTT (Apache Software Foundation) Fixed in 6.2.4
Fix · GHSA-xvqc-pp94-fmpx org.apache.activemq:apache-activemq (Maven) Fixed in 6.2.4 Advisory →
Fix · GHSA-xvqc-pp94-fmpx org.apache.activemq:activemq-all (Maven) Fixed in 6.2.4 Advisory →
Fix · GHSA-xvqc-pp94-fmpx org.apache.activemq:activemq-mqtt (Maven) Fixed in 6.2.4 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 3 products

Red Hat Fuse 7
Red Hat JBoss Enterprise Application Platform 7
Red Hat JBoss Enterprise Application Platform Expansion Pack

Timeline

2026-10-02 Threatist record created from CVE-2026-40046
2026-10-03 Alias added: GHSA-xvqc-pp94-fmpx
2026-10-25 Priority changed: MEDIUM → LOW

References

Advisory 3

Other 1

https://www.cve.org/CVERecord?id=CVE-2025-66168

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See all 4053 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences