CVE-2026-57967 Apache Artemis, Apache ActiveMQ Artemis: Missing authentication on CORE protocol session reattachment
Unauthenticated attackers can hijack active sessions via crafted CORE protocol packets, leading to unauthorized access and potential code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-57967?
CVE-2026-57967 is a critical authentication bypass vulnerability in Apache ActiveMQ Artemis, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2026-57967?
It affects 1 product.
Products include Apache Artemis.
How do I fix CVE-2026-57967?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-57967 being exploited?
There is no known exploitation of CVE-2026-57967 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Apache ActiveMQ Artemis
- CVE-2026-27446 Apache Artemis, Apache ActiveMQ Artemis: Auth bypass for Core downstream federation
- CVE-2026-49364 Information disclosure in Apache ActiveMQ Artemis
- CVE-2026-67593 Missing authorization in Apache ActiveMQ Artemis
- CVE-2023-50780 Apache ActiveMQ Artemis: Authenticated users could perform RCE via Jolokia MBeans
- CVE-2026-49362 Missing authorization in Apache ActiveMQ Artemis
Sources
Also known as GHSA-735c-72gw-5q97.