CVE-2026-12550

IBM MQ is affected by a denial of service vulnerability

Published Nov 4, 2026 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Description

IBM MQ 9.2.0.0 through 9.2.0.44 LTS, 9.3.0.0 through 9.3.0.42 LTS, 9.4.0.0 through 9.4.0.26 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 through 10.0.0.5 LTS and CD could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message selection parameters.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

IBM

affected

Version	Status	Constraints
`9.2.0.0`	affected	≤ 9.2.0.44
`9.3.0.0`	affected	≤ 9.3.0.42
`9.4.0.0`	affected	≤ 9.4.0.26
`9.4.0.0`	affected	≤ 9.4.5.1
`10.0.0.0`	affected	≤ 10.0.0.5

No data.

Vendor Product Versions

Ibm

Version	Status	Scheme	Platform
`[9.2.0.0,9.2.0.44]`	affected	generic	—
`[9.3.0.0,9.3.0.42]`	affected	generic	—
`[9.4.0.0,9.4.0.26]`	affected	generic	—
`[9.4.0.0,9.4.5.1]`	affected	generic	—
`[10.0.0.0,10.0.0.5]`	affected	generic	—

Remediation

Vendor Solution

This issue was addressed under Known Issue DT500603. IBM MQ version 9.2 LTS Apply cumulative security update 9.2.0.46 https://www.ibm.com/support/pages/downloading-ibm-mq-92-lts IBM MQ version 9.3 LTS Apply cumulative security update 9.3.0.43 https://www.ibm.com/support/pages/downloading-ibm-mq-93-lts IBM MQ version 9.4 LTS Apply fix pack 9.4.0.30 https://www.ibm.com/support/pages/downloading-ibm-mq-94 IBM MQ version 10.0.LTS Upgrade to IBM MQ version 10.0.0.6 https://www.ibm.com/support/pages/downloading-ibm-mq-100 IBM MQ version 9.4 CD and 10.0 CD Upgrade to IBM MQ version 10.0.1.0 https://www.ibm.com/support/pages/downloading-ibm-mq-100

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.333% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://www.ibm.com/support/pages/node/7294502

History

Nov 10, 2026 9:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Nov 4, 2026 8:45 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		IBM MQ 9.2.0.0 through 9.2.0.44 LTS, 9.3.0.0 through 9.3.0.42 LTS, 9.4.0.0 through 9.4.0.26 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 through 10.0.0.5 LTS and CD could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message selection parameters.
Title		IBM MQ is affected by a denial of service vulnerability
First Time appeared		Ibm Ibm mq
Weaknesses		CWE-122
CPEs		cpe:2.3:a:ibm:mq:9.2.0.0:::::::* cpe:2.3:a:ibm:mq:9.3.0.0:::::::* cpe:2.3:a:ibm:mq:9.4.0.0:::::::*
Vendors & Products		Ibm Ibm mq
References		https://www.ibm.com/support/pages/node/7294502
Metrics		cvssV3_1 `{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L'}`