CVE-2026-57967

CRITICAL 9.8

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

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306
Vendor	apache software foundation
Product	apache artemis
Published	Sep 10, 2026
Last Updated	Sep 10, 2026

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Affected Versions

Apache Software Foundation / Apache Artemis

2.50.0 ≤ 2.56.0

Apache Software Foundation / Apache ActiveMQ Artemis

1.0.0 ≤ 2.44.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

lists.apache.org: https://lists.apache.org/thread/fxfjqrdsnksw5f17zs3yqo864lblgv6y openwall.com: http://www.openwall.com/lists/oss-security/2026/09/10/5

Credits

Domenico Francesco Bruscino 🔍 Fedrick Sequeira