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CVE-2026-11728

IBM MQ .NET client is vulnerable to remote code execution

CVSS 3.1 8.1 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-11728

Published

IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 could allow a remote attacker to cause a denial of service or potentially execute arbitrary code in the client due to a heap buffer overflow when receiving messages from a malicious queue manager or through a man-in-the-middle attack.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-11728

Published

MQ

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "IBM",
                    "product": "MQ",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "9.1.0.0",
                            "lessThanOrEqual": "9.1.0.37 LTS",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "9.2.0.0",
                            "lessThanOrEqual": "9.2.0.43 LTS",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "9.3.0.0",
                            "lessThanOrEqual": "9.3.0.41 LTS",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "9.3.0.0",
                            "lessThanOrEqual": "9.3.5.1 CD",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "9.4.0.0",
                            "lessThanOrEqual": "9.4.0.25 LTS",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "9.4.0.0",
                            "lessThanOrEqual": "9.4.5.1 CD",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "10.0.0.0"
                        }
                    ],
                    "cpes": [
                        "cpe:2.3:a:ibm:mq:9.1.0.0:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:mq:9.1.0.37:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:mq:9.2.0.0:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:mq:9.2.0.43:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:mq:9.3.0.0:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:mq:9.3.0.41:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:mq:9.3.5.1:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:mq:9.4.0.0:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:mq:9.4.0.25:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:mq:9.4.5.1:*:*:*:*:*:*:*",
                        "cpe:2.3:a:ibm:mq:10.0.0.0:*:*:*:*:*:*:*"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON