EUVD-2026-75246
GHSA-735c-72gw-5q97
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated network attack requiring no user interaction; session hijack yields full confidentiality and integrity access to the victim's messaging session, crossing from unauthenticated to authenticated scope.
Primary rating from Vendor (CNA).
CVSS VectorVendor
Lifecycle Timeline
2Description PRE-NVD
Articles & Coverage 1
AnalysisAI
Session hijacking in Apache ActiveMQ Artemis and Apache Artemis allows unauthenticated remote attackers to steal authenticated messaging sessions by sending a crafted CORE protocol SESSION_REATTACH packet, granting full control of an existing authenticated session without any credentials. The CORE protocol's session reattachment mechanism - designed for fault-tolerant HA reconnection - performs no identity verification, enabling any network-accessible attacker to impersonate legitimate connected clients. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Artemis CORE protocol listener must be network-accessible to the attacker - this is the default on port TCP 61616 unless firewall rules restrict access. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is substantial for any deployment where the CORE protocol port is reachable from untrusted networks. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to Apache Artemis version 2.57.0 or later (released September 9, 2026), which adds proper authentication validation to the CORE protocol SESSION_REATTACH flow. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Apache ActiveMQ Artemis deployments (1.0.0-2.44.0) across production and non-production environments; assess network accessibility to identify which brokers are exposed to untrusted networks. …
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Same technique Authentication Bypass
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External POC / Exploit Code
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