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High severity7.5NVD Advisory· Published Jun 30, 2026· Updated Jul 2, 2026

CVE-2026-53917

CVE-2026-53917

Description

Memory 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.

Affected products

6
  • Apache/Activemq3 versions
    cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*range: <5.19.8
    • cpe:2.3:a:apache:activemq_broker:*:*:*:*:*:*:*:*range: <5.19.8
    • (no CPE)range: <5.19.8, >=6.0.0 <6.2.7
  • Apache/ActiveMQ Clientllm-fuzzy
    Range: <5.19.8, >=6.0.0 <6.2.7
  • Apache/ActiveMQ Brokerllm-fuzzy
    Range: <5.19.8, >=6.0.0 <6.2.7
  • osv-coords
    pkg:bitnami/activemq
    Range: < 5.19.8

Patches

Vulnerability mechanics

References

2

News mentions

4