CVE-2026-50750Network attack vector

Broker crash via repeated OpenWire BrokerInfo commands

Published Jun 30, 2026 · Updated Jun 30, 2026

Resource exhaustion in Apache ActiveMQ 5.19.7 and 6.2.6 allows remote attackers to crash the broker through unauthenticated OpenWire traffic. The OpenWire connection handler accepts repeated BrokerInfo commands before ConnectionInfo instead of rejecting the second command, consuming broker heap with each repetition. No credentials or user interaction are required; sustained repetition exhausts memory and terminates the broker process.

CVSS severity7.5
High
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Apache ActiveMQ 5.19.7 and 6.2.6 allows remote attackers to crash the broker through unauthenticated OpenWire traffic. The OpenWire connection handler accepts repeated BrokerInfo commands before ConnectionInfo instead of rejecting the second command, consuming broker heap with each repetition. No credentials or user interaction are required; sustained repetition exhausts memory and terminates the broker process.

The record

CVE
CVE-2026-50750
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
The Apache Software Foundation
Product
Apache ActiveMQ All
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.19.7 <5.19.8
  2. Affected versionversion=6.2.6 <6.2.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache ActiveMQ Allversion=5.19.7 <5.19.8; version=6.2.6 <6.2.7
The Apache Software Foundation · Apache ActiveMQ Brokerversion=5.19.7 <5.19.8; version=6.2.6 <6.2.7
The Apache Software Foundation · Apache ActiveMQversion=5.19.7 <5.19.8; version=6.2.6 <6.2.7

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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