Auth bypass in Apache Artemis
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.015 (73.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.015 · change: +0.004
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread/fxfjqrdsnksw5f17zs3yqo864lblgv6y (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-57967?
- CVE-2026-57967 is a critical-severity vulnerability in Apache Artemis, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-09-10.
- How severe is CVE-2026-57967?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-57967 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.