CVE-2026-12356

IBM MQ Managed File Transfer is affected by an arbitrary code execution vulnerability

7.5 High

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 user with command queue access to execute arbitrary code by injecting malicious arguments into Ant script commands.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.34%Unchanged since Nov 5, 2026

What each source reports

CVE List Score used 7.5

IBM MQ Managed File Transfer is affected by an arbitrary code execution vulnerability

Record: CVE-2026-12356
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-74
Updated: 2026-11-06

EUVDEUVD-2026-117073 7.5

Record: EUVD-2026-117073
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-06

GitHub AdvisoriesGHSA-fpj9-29gw-3mr3 7.5

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,...

Record: GHSA-fpj9-29gw-3mr3
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-74
Updated: 2026-11-04

NVD 7.5

Record: CVE-2026-12356
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-74
Updated: 2026-11-06

Affected products

ibm mq

History

History
Recorded	Changed	Sources
Nov 5, 2026	published	EUVD
Nov 4, 2026	published	EUVD, NVD
Nov 4, 2026	first indexed	CVE List, EUVD, GitHub Advisories

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-12356 is a high vulnerability (CVSS 7.5) in Ibm Mq, published November 4, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.34%, the 27th percentile. No source names a fixed version.