Apache ActiveMQ < 5.19.12 / 6.x < 6.3.3 Multiple Vulnerabilities

critical Nessus Plugin ID 376983

Synopsis

The remote host is running a web application that is affected by multiple vulnerabilities.

Description

The version of Apache ActiveMQ running on the remote host is prior to 5.19.12, or 6.x prior to 6.3.3. It is, therefore, affected by multiple vulnerabilities:

- Improper invalidation of cached authorizations vulnerability in Apache ActiveMQ, Apache ActiveMQ Runtime Config.
After the runtime configuration plugin removes a principal's write grant on a destination, an authenticated connection opened before the change can keep sending to that destination, including through a new anonymous producer, while fresh connections and new explicit producers are denied. (CVE-2026-111822)

- Denial of Service via OOM vulnerability in Apache ActiveMQ, ActiveMQ Broker. An authenticated OpenWire client that sends a ConsumerInfo for a temporary queue/topic owned by another connection is rejected with InvalidDestinationException, but the rejected Subscription is left behind in the region's subscriptions map.
Repeating the request leaks broker heap until OOM because the broker does not clean up the rejected subscriptions in the map. (CVE-2026-108949)

- Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB. A user can create a durable subscription with a clientId and subscription name that have a combined length > 65,535 (while separately being shorter) on a broker using KahaDB which can cause the broker to shutdown and be unrecoverable. (CVE-2026-111821)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Apache ActiveMQ version 5.19.12, 6.3.3, 6.4.0, or later.

Plugin Details

Severity: Critical

ID: 376983

File Name: activemq_6_3_3.nasl

Version: 1.2

Type: Combined

Agent: unix

Family: CGI abuses

Published: 11/6/2026

Updated: 11/6/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Enable CGI Scanning: true

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.54

CVSS v2

Risk Factor: High

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-111822

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Vulnerability Information

CPE: cpe:/a:apache:activemq

Required KB Items: installed_sw/Apache ActiveMQ

Patch Publication Date: 11/3/2026

Vulnerability Publication Date: 11/3/2026

Reference Information

CVE: CVE-2026-108949, CVE-2026-111821, CVE-2026-111822

IAVB: 2026-B-0311

Detections

Analytics