CVE-2026-50734

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-50734
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50734.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-50734
Aliases
Downstream
Published
2026-06-30T09:53:03.435Z
Modified
2026-07-08T08:09:43.404476424Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire memory-allocation DoS during wire format negotiation
Details

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.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "fixed": "5.19.8"
                },
                {
                    "introduced": "6.0.0"
                },
                {
                    "fixed": "6.2.7"
                },
                {
                    "fixed": "5.19.8"
                },
                {
                    "introduced": "6.0.0"
                },
                {
                    "fixed": "6.2.7"
                },
                {
                    "fixed": "5.19.8"
                },
                {
                    "introduced": "6.0.0"
                },
                {
                    "fixed": "6.2.7"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "fixed": "5.19.8"
                },
                {
                    "introduced": "6.0.0"
                },
                {
                    "fixed": "6.2.7"
                },
                {
                    "fixed": "5.19.8"
                },
                {
                    "introduced": "6.0.0"
                },
                {
                    "fixed": "6.2.7"
                },
                {
                    "fixed": "5.19.8"
                },
                {
                    "introduced": "6.0.0"
                },
                {
                    "fixed": "6.2.7"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50734.json",
    "cna_assigner": "apache",
    "cwe_ids": [
        "CWE-789"
    ]
}
References

Affected packages

Git / github.com/apache/activemq

Affected ranges

Type
GIT
Repo
https://github.com/apache/activemq
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
7d56ebc8e04dd0a2a14545cfa05883f9bdba72a2
Introduced
14bac13f40958c1a1d3d198051eed32facc4abd1
Fixed
f3e61919b374ee5b124f80458334c314fc2cb29d
Database specific 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "5.19.8"
        },
        {
            "introduced": "6.0.0"
        },
        {
            "fixed": "6.2.7"
        }
    ]
}

Affected versions

activemq-5.*
activemq-5.10.0
activemq-5.11.0
activemq-5.12.0
activemq-5.13.0
activemq-5.14.0
activemq-5.15.0
activemq-5.16.0
activemq-5.18.0
activemq-5.18.1
activemq-5.18.2
activemq-5.18.3
activemq-5.18.4
activemq-5.18.5
activemq-5.18.6
activemq-5.19.0
activemq-5.19.1
activemq-5.19.2
activemq-5.9.0
activemq-6.*
activemq-6.0.0
activemq-6.1.0
activemq-6.1.1
activemq-6.1.2
activemq-6.2.0
activemq-6.2.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50734.json"