Description
An unauthenticated remote attacker can craft a CORE protocol SESSION_REATTACH packet to steal an existing session and assume ongoing execution of the previously authenticated session.



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.
Published: 2026-09-10
Score: 7.4 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 10 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}

threat_severity

Important


Thu, 10 Sep 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache activemq Artemis
Apache artemis
Vendors & Products Apache
Apache activemq Artemis
Apache artemis

Thu, 10 Sep 2026 06:30:00 +0000

Type Values Removed Values Added
References

Thu, 10 Sep 2026 05:00:00 +0000

Type Values Removed Values Added
Description An unauthenticated remote attacker can craft a CORE protocol SESSION_REATTACH packet to steal an existing session and assume ongoing execution of the previously authenticated session. 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.
Title Apache Artemis, Apache ActiveMQ Artemis: Missing authentication on CORE protocol session reattachment
Weaknesses CWE-306
References

Subscriptions

Apache Activemq Artemis Artemis
cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-09-10T15:52:25.278Z

Reserved: 2026-06-26T17:05:04.459Z

Link: CVE-2026-57967

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-10T05:17:01.443

Modified: 2026-09-10T14:50:07.813

Link: CVE-2026-57967

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-10T05:40:15Z

Links: CVE-2026-57967 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T13:30:12Z

Weaknesses