CVE-2026-12538
IBM MQ Appliance is affected by an improper validation vulnerability
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.
Fixes and workarounds
Fix
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.
Source: CNA: ibmFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: ibmAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| MQ Appliance IBM |
≥ 9.4.0.0; ≤ 9.4.0.26 (affected, semver) ≥ 9.4.1.0; ≤ 9.4.5.3 (affected, semver) ≥ 10.0.0.1; ≤ 10.0.0.5 (affected, semver) |
CNA: ibm |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 5.4 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L | CNA: ibm |
| 3.1 / 5.4 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://www.ibm.com/support/pages/node/7293035CNA: ibm · vendor-advisory, patch
- https://www.ibm.com/support/pages/node/7293035[email protected]
For agents and automation
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