EUVD-2026-83021
GHSA-94jh-fv89-qhj3
Severity by source
AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-delivered crafted objects (AV:N) reach a specific exception path (AC:H) requiring authenticated MQ access (PR:L); code execution on the client yields full C:H/I:H/A:H with no scope change.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
Lifecycle Timeline
2DescriptionCVE.org
IBM MQ Java and JMS client libraries could allow an authenticated attacker to execute arbitrary code on client applications due to a deserialization filter bypass in exception handling.
Articles & Coverage 1
AnalysisAI
Remote code execution in IBM MQ Java and JMS client libraries allows an authenticated attacker with access to a message queue or topic to bypass the deserialization allow-list filter in exception handling and execute arbitrary code on client applications. The flaw is network-reachable but requires low-privileged authentication (PR:L) and is limited to a specific exception-handling path (AC:H), with impact confined to the client process rather than the MQ server. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires the IBM MQ Java or JMS client libraries to be in use by a consuming application. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor CVSS 3.1 vector (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H = 7.5 High) reflects a network-reachable but non-trivial code-execution flaw requiring authentication. … 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 | Apply the vendor-released patch available from IBM (see advisory https://www.ibm.com/support/pages/node/7284898 for the exact fix version and instructions). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every application embedding IBM MQ Java or JMS client libraries, map which queues and topics those applications read from, and confirm which identities hold even low-privileged publish or subscribe rights, because exploitation requires authenticated queue access (PR:L) - treat any queue writable by a broad or external group as priority. …
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External POC / Exploit Code
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