IBM MQ Appliance is affected by an improper validation vulnerability
Summary
| CVE | CVE-2026-12538 |
|---|---|
| State | PUBLISHED |
| Assigner | ibm |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-04 21:18:11 UTC |
| Updated | 2026-11-04 21:18:11 UTC |
| Description | IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields. |
Risk And Classification
Primary CVSS: v3.1 5.4 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
Problem Types: CWE-124 | CWE-124 CWE-124 Buffer Underwrite ('Buffer Underflow')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 5.4 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L |
| 3.1 | CNA | CVSS | 5.4 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | IBM | MQ Appliance | affected 9.4.0.0 9.4.0.26 semver | Not specified |
| CNA | IBM | MQ Appliance | affected 9.4.1.0 9.4.5.3 semver | Not specified |
| CNA | IBM | MQ Appliance | affected 10.0.0.1 10.0.0.5 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.ibm.com/support/pages/node/7293035 | [email protected] | www.ibm.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
Solutions
CNA: This vulnerability is addressed under APAR DT500605. IBM strongly recommends addressing the vulnerability now. IBM MQ Appliance version 9.4 LTS Apply IBM MQ Appliance fix pack 9.4.0.30 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware. IBM MQ Appliance version 9.4 CD - M2003 Upgrade to IBM MQ Appliance 10.0.0.6 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware. IBM MQ Appliance version 9.4 CD - M2002 Apply IBM MQ Appliance cumulative security update 9.4.5.4 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware. IBM MQ Appliance version 10 LTS Apply IBM MQ Appliance cumulative security update 10.0.0.6 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware.