--- title: "CVE-2026-12150: IBM MQ - Denial of Service" description: "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 contain a denial of service caused by improper validation of deeply nested certificate data during TLS certificate processing, letting remote attackers with trusted TLS client certificates cause service disruption and potential memory corruption, exploit requires trusted TLS client certificate." url: https://panop.io/threat-heartbeat/CVE-2026-12150/ --- # CVE-2026-12150 IBM MQ - Denial of Service 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 contain a denial of service caused by improper validation of deeply nested certificate data during TLS certificate processing, letting remote attackers with trusted TLS client certificates cause service disruption and potential memory corruption, exploit requires trusted TLS client certificate. CVSS base score 7.0 /10 High CISA KEV Not listed Public exploit None known EPSS 0.17% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-12150) ## Details Type Denial of Service Impact Denial Of Service CVSS vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H Published 15 September 2026 Updated 15 October 2026 Weakness [CWE-121](https://cwe.mitre.org/data/definitions/121.html) ## Vendor fix Update to the latest available version. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-12150](https://nvd.nist.gov/vuln/detail/CVE-2026-12150) - [https://www.ibm.com/support/pages/node/7284911](https://www.ibm.com/support/pages/node/7284911) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)