CVE-2026-57967

Critical

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.

SeverityCritical

CVSS9.8

Exploit probability—

Product

Apache Artemis

PublishedSep 10, 2026

First seenSep 10, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Update

apache artemis2.44.0, 2.57.0 or later

Vendor advisories

lists.apache.org/thread/fxfjqrdsnksw5f17zs3yqo864lblgv6y

Affected products

Product	Affected versions	Fixed in
apache artemis	1.0.0 ≤ v < 2.44.0, 2.50.0 ≤ v < 2.57.0	2.44.0, 2.57.0

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.