CVE-2026-57967

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.

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

1.5% chance of exploitation in the next 30 days; higher than 73% of CVEs (scores of 2026-10-25)

CWE

CWE-306

Published

2026-09-10

Modified

2026-10-09

Record from

the NVD, synced 2026-10-19

Affected

• apache:artemis

References

• https://lists.apache.org/thread/fxfjqrdsnksw5f17zs3yqo864lblgv6y
• http://www.openwall.com/lists/oss-security/2026/09/10/5
• https://github.com/c0dem4sters/CVE-2026-57967

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