An unauthenticated remote attacker can craft a CORE protocol SESSION_REATTACH packet to steal an existing session and assume ongoing execution of… (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.
AI Analysis
Technical Summary
The vulnerability (CVE-2026-57967) allows an unauthenticated remote attacker to craft a specially designed CORE protocol SESSION_REATTACH packet that can hijack an existing session in Apache Artemis and Apache ActiveMQ Artemis. By doing so, the attacker can assume the ongoing execution context of a previously authenticated session, potentially bypassing authentication controls. This affects Apache Artemis versions 2.50.0 through 2.56.0 and Apache ActiveMQ Artemis versions 1.0.0 through 2.44.0. The issue is resolved in version 2.57.0.
Potential Impact
Successful exploitation enables an unauthenticated attacker to hijack an active session, effectively gaining the privileges and access rights of the authenticated user associated with that session. This can lead to unauthorized actions being performed within the context of the hijacked session.
Mitigation Recommendations
Users should upgrade to Apache Artemis version 2.57.0 or later, which contains the official fix for this vulnerability. No other mitigations are specified. Patch status is confirmed by the vendor advisory recommending upgrade to 2.57.0.
An unauthenticated remote attacker can craft a CORE protocol SESSION_REATTACH packet to steal an existing session and assume ongoing execution of… (CVE-2026-57967)
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.
CVSS v3.1
Score 9.8critical
Affected software
pkg:maven/org.apache.activemq/artemis-core-clientRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability (CVE-2026-57967) allows an unauthenticated remote attacker to craft a specially designed CORE protocol SESSION_REATTACH packet that can hijack an existing session in Apache Artemis and Apache ActiveMQ Artemis. By doing so, the attacker can assume the ongoing execution context of a previously authenticated session, potentially bypassing authentication controls. This affects Apache Artemis versions 2.50.0 through 2.56.0 and Apache ActiveMQ Artemis versions 1.0.0 through 2.44.0. The issue is resolved in version 2.57.0.
Potential Impact
Successful exploitation enables an unauthenticated attacker to hijack an active session, effectively gaining the privileges and access rights of the authenticated user associated with that session. This can lead to unauthorized actions being performed within the context of the hijacked session.
Mitigation Recommendations
Users should upgrade to Apache Artemis version 2.57.0 or later, which contains the official fix for this vulnerability. No other mitigations are specified. Patch status is confirmed by the vendor advisory recommending upgrade to 2.57.0.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-735c-72gw-5q97
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-57967"]
Threat ID: 6aa2af85acd9273b4925b43f
Added to database: 09/10/2026, 13:24:21 UTC
Last enriched: 09/10/2026, 13:37:13 UTC
Last updated: 09/11/2026, 15:02:35 UTC
Views: 23
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