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High, CVSS 7.5

Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker have Memory Allocation with Excessive Size Value vulnerability

CVE-2026-53917GHSA-f77w-px59-cqf5

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (org.apache.activemq:activemq-broker 6.2.7, 5.19.8; org.apache.activemq:apache-activemq 6.2.7, 5.19.8; org.apache.activemq:activemq-client 6.2.7, 5.19.8; org.apache.activemq:activemq-all 6.2.7, 5.19.8), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

  • GitHub Advisory Database and maintainer security advisories on GitHub

    GitHub-reviewed advisory GHSA-f77w-px59-cqf5 lists affected ranges: Maven org.apache.activemq:apache-activemq >=0 =6.0.0 =0 =6.0.0 =0 =6.0.0 =0 =6.0.0 <6.2.7

    VerifiedObserved Structured GitHub Advisory Database record (type=reviewed) from the GitHub REST API.

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

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.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-f77w-px59-cqf5

Agent brief

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# Patch Next advisory brief: CVE-2026-53917

Advisory: Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker have Memory Allocation with Excessive Size Value vulnerability
IDs: CVE-2026-53917, GHSA-f77w-px59-cqf5
Record: https://patchnext.com/advisories/cve-2026-53917 (revision 1, source checked 4 Nov 2026, 16:55 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.apache.activemq:activemq-broker 6.2.7, 5.19.8; org.apache.activemq:apache-activemq 6.2.7, 5.19.8; org.apache.activemq:activemq-client 6.2.7, 5.19.8; org.apache.activemq:activemq-all 6.2.7, 5.19.8. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.apache.activemq:activemq-broker: affected < 5.19.8; >= 6.0.0, < 6.2.7; fixed in 5.19.8, 6.2.7
- Maven org.apache.activemq:apache-activemq: affected < 5.19.8; >= 6.0.0, < 6.2.7; fixed in 5.19.8, 6.2.7
- Maven org.apache.activemq:activemq-client: affected < 5.19.8; >= 6.0.0, < 6.2.7; fixed in 5.19.8, 6.2.7
- Maven org.apache.activemq:activemq-all: affected < 5.19.8; >= 6.0.0, < 6.2.7; fixed in 5.19.8, 6.2.7

## Suggested inspection (read-only)
- Maven org.apache.activemq:activemq-broker: check the installed version with your package manager.
- Maven org.apache.activemq:apache-activemq: check the installed version with your package manager.
- Maven org.apache.activemq:activemq-client: check the installed version with your package manager.
- Maven org.apache.activemq:activemq-all: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.apache.activemq:activemq-broker, org.apache.activemq:apache-activemq, org.apache.activemq:activemq-client, org.apache.activemq:activemq-all.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-f77w-px59-cqf5 (GitHub-reviewed advisory GHSA-f77w-px59-cqf5 lists affected ranges: Maven org.apache.activemq:apache-activemq >=0 =6.0.0 =0 =6.0.0 =0 =6.0.0 =0 =6.0.0 <6.2.7)

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