What is CVE-2026-40914?

CVE-2026-40914 is a medium-severity vulnerability in Apache Activemq Artemis, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-05-28.

How severe is CVE-2026-40914?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Apache Activemq Artemis

CVE-2026-40914

A vulnerability exists in Apache Artemis whereby an application using the STOMP protocol with security credentials that grant either the consume or send permission on an address can augment the routing-type supported by that address even if said user doesn't have the createAddress permission for that particular address. A user could successfully send a message to an address or consume a message from a queue with a routing-type not supported by the corresponding address when that operation should actually be rejected on the basis that the user doesn't have permission to change the routing-type of the address. Even though the user was already granted permission to send and/or consume messages, they should not be able to augment the routing-type of the address without the createAddress permission. This issue affects Apache Artemis: from 2.50.0 through 2.53.0; Apache ActiveMQ Artemis: from 2.0.0 through 2.44.0. Users are recommended to upgrade to version 2.54.0, which fixes the issue.

Vulnerability class: Broken Access Control

Published 2026-05-28 · last modified 2026-10-14.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.3th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002

Affected products

Apache Activemq Artemis
Apache Artemis
Apache Software Foundation Activemq Artemis Stomp Protocol — versions 2.0.0
Apache Software Foundation Artemis Stomp Protocol — versions 2.50.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

lists.apache.org/thread/6q3st8dlorz2q05svqn11k1xl7jkmm4c (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-40914?: CVE-2026-40914 is a medium-severity vulnerability in Apache Activemq Artemis, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-05-28.
How severe is CVE-2026-40914?: Medium severity. CVSS v3 base score is 4.3 out of 10.