High7.5Apache Software Foundation

High [CVE-2026-59878] Improper Input Validation vulnerability in Apache ActiveMQ AMQP, Apache ActiveMQ, Apache ActiveMQ All

This high-severity Apache Software Foundation advisory covers CVE-2026-59878 affecting Apache ActiveMQ AMQP, Apache ActiveMQ All.

CVE-2026-59878 Published Jul 28, 2026Updated by vendor Jul 28, 2026

CVE-2026-59878

Affected products & platforms

Apache Software FoundationMessagingActiveMQ

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Summary

Improper Input Validation vulnerability in Apache ActiveMQ AMQP, Apache ActiveMQ, Apache ActiveMQ All.

A remote unauthenticated peer that can reach an exposed AMQP NIO connector can trigger denial-of-service behavior by sending a frame size value. This cause the NIO threads to die and if done rapidly enough can lead to exhaustion of the NIO thread pool denying service to other connections.

This issue affects Apache ActiveMQ AMQP: before 5.19.9, from 6.0.0 before 6.2.8; Apache ActiveMQ: before 5.19.9, from 6.0.0 before 6.2.8; Apache ActiveMQ All: before 5.19.9, from 6.0.0 before 6.2.8.

Users are recommended to upgrade to version 5.19.9, 6.2.8, or 6.3.0 which fixes the issue.

Affected versions

6.0.0 through 6.2.8
6.0.0 through 6.2.8.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

5.19.9
6.2.8
6.3.0

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Users are recommended to upgrade to version 5.19.9, 6.2.8, or 6.3.0 which fixes the issue.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed for the summary, affected/fixed versions and remediation guidance it provides.
Apache Software Foundation
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-59878 instead of the raw feed document.
CVE Program

Cross-references

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CVE-2026-59878NVD CVE.org MITRE

Official resources

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