Is CVE-2026-13271 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-13271 being exploited in the wild.

How severe is CVE-2026-13271?

High severity, with a CVSS score of 8.1, published 4 November 2026.

Which products and versions are affected?

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, 10.0.0.0 to 10.0.0.5 LTS and CD.

Is there a fix for CVE-2026-13271?

Yes: fixed in IBM MQ 9.2.0.46 LTS, 9.3.0.43 LTS, 9.4.0.30 LTS, 10.0.0.6 LTS, 10.0.1.0 CD. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-13271 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-13271?

Check whether you run IBM Mq at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-13271: IBM MQ Managed File Transfer XXE in command queue processing

CVE-2026-13271 · Severity: high · CVSS 8.1 · Published 2026-11-04

IBM MQ Managed File Transfer, a middleware component that secures message queuing and file transfer workflows, contains a vulnerability in how it processes command queue messages. An authenticated attacker can exploit this to extract sensitive information from the system or disrupt operations by crafting malicious XML messages with external entity references. This affects multiple versions across all supported release tracks.

Technologies: IBM Mq. Vendors: IBM.

Quick answers

Is CVE-2026-13271 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-13271 being exploited in the wild.
How severe is CVE-2026-13271?: High severity, with a CVSS score of 8.1, published 4 November 2026.
Which products and versions are affected?: 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, 10.0.0.0 to 10.0.0.5 LTS and CD.
Is there a fix for CVE-2026-13271?: Yes: fixed in IBM MQ 9.2.0.46 LTS, 9.3.0.43 LTS, 9.4.0.30 LTS, 10.0.0.6 LTS, 10.0.1.0 CD. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-13271 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-13271?: Check whether you run IBM Mq at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: IBM MQ 9.2.0.46 LTS, 9.3.0.43 LTS, 9.4.0.30 LTS, 10.0.0.6 LTS, 10.0.1.0 CD

Technical details

The vulnerability is an XML External Entity (XXE) injection flaw (CWE-611) in the Managed File Transfer component's command queue processing. An authenticated attacker on the network can send specially crafted XML messages that trigger unrestricted entity reference expansion, allowing information disclosure or denial of service. The fix is available in patched versions released by IBM.

Affected products

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, 10.0.0.0 to 10.0.0.5 LTS and CD

Timeline

2026-10-29: disclosed

References

https://www.ibm.com/support/pages/node/7294654

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