CVE-2026-57967

Apache Artemis, Apache ActiveMQ Artemis: Missing authentication on CORE protocol session reattachment

Published Sep 10, 2026 CVSS 3.1 · 9.8 Critical EPSS 1.5% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:apache:artemis:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics 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'}

cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

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

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

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Oct 9, 2026, 3:36 PM
Reserved
Jun 26, 2026, 5:05 PM
Status
Modified
Published
Sep 10, 2026, 5:17 AM
Modified
Oct 9, 2026, 4:17 PM
Severity
Important
Public date
Sep 10, 2026, 5:40 AM