---
id: CVE-2026-49363
title: >-
  An unauthenticated remote attacker connecting with the CORE protocol can
  discover cluster node details by sending a SUBSCRIBE_TOPOLOGY request prior to
  authentication.




  This issue affects Apache Artemis: from 2.50.0 through 2.56.0; Apa…
summary: >-
  An unauthenticated remote attacker connecting with the CORE protocol can
  discover cluster node details by sending a SUBSCRIBE_TOPOLOGY request prior to
  authentication.




  This issue affects Apache Artemis: from 2.50.0 through 2.56.0; Apa…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-306
vendor: apache
product: artemis
affected:
  - 'artemis >= 1.0.0, < 2.44.0'
  - 'artemis >= 2.50.0, < 2.57.0'
patched:
  - artemis 2.57.0
published: '2026-09-10'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T01:10:36.583'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-49363'
references:
  - url: 'https://lists.apache.org/thread/syjch88zw6pfdoso9vs46m23xkgxjbxo'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/10/2'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49363.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-49363'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2492627'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-49363'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-49363'
  - url: 'https://access.redhat.com/errata/RHSA-2026:70230'
  - url: 'https://access.redhat.com/errata/RHSA-2026:70228'
  - url: 'https://access.redhat.com/errata/RHSA-2026:70229'
  - url: 'https://access.redhat.com/errata/RHSA-2026:66545'
  - url: 'https://access.redhat.com/errata/RHSA-2026:66488'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00804
epssPercentile: 0.54889
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-10T15:55:02.760409Z'
ingestedAt: '2026-09-13T23:56:14.799Z'
scores:
  nvd: 7.5
  vendor: 5.3
---

## Overview

An unauthenticated remote attacker connecting with the CORE protocol can discover cluster node details by sending a SUBSCRIBE_TOPOLOGY request prior to authentication.



This issue affects Apache Artemis: from 2.50.0 through 2.56.0; Apache ActiveMQ Artemis: from 1.0.0 through 2.44.0.



Users are recommended to upgrade to version 2.57.0, which fixes the issue.

## Affected

- `artemis >= 1.0.0, < 2.44.0`
- `artemis >= 2.50.0, < 2.57.0`

## Remediation

Upgrade past the affected range:

- `artemis 2.57.0`

## Vendor advisories

- **RHSA-2026:70230** · Red Hat · fixed in: Red Hat JBoss EAP 8.1 for RHEL 10 · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:70230)
- **RHSA-2026:70228** · Red Hat · fixed in: Red Hat JBoss EAP 8.1 for RHEL 8 · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:70228)
- **RHSA-2026:70229** · Red Hat · fixed in: Red Hat JBoss EAP 8.1 for RHEL 9 · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:70229)
- **RHSA-2026:66545** · Red Hat · fixed in: Red Hat AMQ Broker 7.13.6 · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66545)
- **RHSA-2026:66488** · Red Hat · fixed in: Red Hat AMQ Broker 7.14.1 · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66488)
- **Red Hat VEX** · Moderate · affected: Red Hat JBoss Enterprise Application Platform 7, Red Hat JBoss Enterprise Application Platform Expansion Pack · no fix planned: Red Hat JBoss Enterprise Application Platform 7, Red Hat JBoss Enterprise Application Platform Expansion Pack · updated 2026-09-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49363.json)