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CVE-2026-49364

Apache Artemis, Apache Artemis, Apache ActiveMQ Artemis, Apache ActiveMQ Artemis: Pre-Authentication Cluster Credential Exposure to Discovered Peers

CRITICAL
9.1
CVSS Score
Published: September 10, 2026 at 04:49 AM UTC
Updated: September 16, 2026 at 01:20 AM UTC
1 product affected across 1 vendorArtemis

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Severity
CRITICAL9.1
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

An unauthenticated network-adjacent attacker can leverage discovery to capture cluster administrative credentials during the initial cluster connection handshake. 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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Artemis· Apachemaven
95%
1.0.0 ≤ v ≤ 2.44.01.0.0 ≤ v < 2.44.02.50.0 ≤ v ≤ 2.56.02.50.0 ≤ v < 2.57.01.0.02.50.0
Affected range stops below 2.44.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.57.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryMailing List
Source: cverecord
https://lists.apache.org/thread/4qbgcz3k38q30bfbf7hphtomrdc8l8n8
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/09/10/3

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.1CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-306

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