CVE-2026-57967
Apache Artemis, Apache ActiveMQ Artemis: Missing authentication on CORE protocol session reattachment
CRITICAL 9.8EPSS 1.5%
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.
- Affected
- Apache Software Foundation · Apache Artemis · Apache ActiveMQ Artemis
- CVSS v3.1 CNA
- 9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS
- 1.47% chance of exploitation in the next 30 days, 73rd percentile
- Published
- 2026-09-10
- Updated
- 2026-10-09
Proof-of-concept exploits (1)
- c0dem4sters/CVE-2026-579671★ · 2026-10-06
Security advisories
- https://lists.apache.org/thread/fxfjqrdsnksw5f17zs3yqo864lblgv6y
- http://www.openwall.com/lists/oss-security/2026/09/10/5