CVE-2026-49364 Apache CVE debrief

Who should care

Defenders of Apache Artemis and Apache ActiveMQ Artemis deployments should assess exposure and prioritize upgrading to version 2.57.0. Operators of affected platforms should review compensating controls for exposed systems while remediation is scheduled and verified. Security teams should track exceptions, retest remediated assets, and close the item only after evidence is documented.

Why it matters

CVE-2026-49364 is a critical vulnerability in Apache Artemis and Apache ActiveMQ Artemis that allows unauthenticated network-adjacent attackers to capture cluster administrative credentials. Defenders should prioritize upgrading to version 2.57.0 and review affected versions.

• Potential credential capture by unauthenticated attackers
• Required upgrade to version 2.57.0 for fix

Technical summary

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. The vulnerability allows for potential credential capture by unauthenticated attackers. Users are recommended to upgrade to version 2.57.0, which fixes the issue. Defenders should review affected versions and prioritize upgrading to version 2.57.0.

Defensive priority

Upgrade to version 2.57.0 to fix the issue.

Recommended defensive actions

• Upgrade to version 2.57.0
• Review and update affected versions
• Monitor for potential credential capture
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record indicates that 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.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.