Critical [CVE-2026-57967] Apache Artemis, Apache ActiveMQ Artemis: Missing authentication on CORE protocol session reattachment
This critical-severity Apache Software Foundation advisory covers CVE-2026-57967 affecting Apache Artemis.
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Summary
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.
- Apache Artemis 2.50.0 through 2.56.0
- Apache ActiveMQ Artemis 1.0.0 through 2.44.0
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 2.57.0
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Users are recommended to upgrade to version 2.57.0, which fixes the issue.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
More Apache Software Foundation advisories
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- CVE-2026-49363Sep 10, 2026Apache Artemis: unauthenticated remote attacker connecting with the CORE protocol can
- CVE-2026-49364Sep 10, 2026Apache Artemis: unauthenticated network-adjacent attacker can leverage discovery
- CVE-2026-57822Sep 10, 2026Apache Artemis: When the broker is processing message-based management requests, sent
- CVE-2026-67593Sep 10, 2026Apache Artemis: remote attacker can craft an Openwire RemoveSubscriptionInfo command
- CVE-2026-75880Sep 10, 2026Apache Artemis, Apache ActiveMQ Artemis: Message selector wildcard handling could lead
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