PT-2026-53841 · Apache · Apache Activemq+2

Andrej Tomci · Published 2026-06-30 · Updated 2026-06-30 · CVE-2026-50734

NVD

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All.

An unauthenticated network attacker can cause a broker DoS by sending a crafted WireFormatInfo frame with a malicious large size value. The value is not validate and causes the broker to attempt allocation during pre-auth negotiation which can trigger OOM and crash the broker. This issue affects Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; 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.

Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.

Fix

Weakness Enumeration

CWE-789

Related Identifiers

CVE-2026-50734

Affected Products

Apache Activemq

Apache Activemq Apollo

Apache Activemq Client

References · 3

• https://lists.apache.org/thread/nxso951fnvf72qf9m475mpz4yf931xk0 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-50734 · Security Note
• http://openwall.com/lists/oss-security/2026/06/29/10 · Note