Resource exhaustion in Apache Activemq
CVE-2026-50750
Denial 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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Apache Activemq — versions 5.19.7, 6.2.6
- Apache Activemq Broker — versions 5.19.7, 6.2.6
- Apache Software Foundation Activemq — versions 5.19.7, 6.2.6
- Apache Software Foundation Activemq All — versions 5.19.7, 6.2.6
- Apache Software Foundation Activemq Broker — versions 5.19.7, 6.2.6
Weakness classification (CWE)
References
- lists.apache.org/thread/nhkmbdym61yp6wwy0dny8w1p46sm87kr (vendor-advisory, Mailing List, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-50750?
- CVE-2026-50750 is a high-severity vulnerability in Apache Activemq, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-06-30.
- How severe is CVE-2026-50750?
- High severity. CVSS v3 base score is 7.5 out of 10.