# CVE-2026-13271: IBM MQ Managed File Transfer is affected by a denial of service vulnerability

Status: published. Published: 2026-11-04. Updated: 2026-11-09.

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.

## Remediation

- fix: This issue was addressed under Known Issue DT474627.



IBM MQ version 9.2 LTS



 Apply cumulative security update 9.2.0.46 https://www.ibm.com/support/pages/downloading-ibm-mq-92-lts 



IBM MQ version 9.3 LTS



 Apply cumulative security update 9.3.0.43 https://www.ibm.com/support/pages/downloading-ibm-mq-93-lts 



IBM MQ version 9.4 LTS



 Apply fix pack 9.4.0.30 https://www.ibm.com/support/pages/downloading-ibm-mq-94 



IBM MQ version 10.0.LTS



 Upgrade to IBM MQ version 10.0.0.6 https://www.ibm.com/support/pages/downloading-ibm-mq-100 



IBM MQ version 9.4 CD and 10.0 CD



 Upgrade to IBM MQ version 10.0.1.0 https://www.ibm.com/support/pages/downloading-ibm-mq-100 (source: CNA: ibm)
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: ibm) — https://www.ibm.com/support/pages/node/7294654

## Affected products and versions

- IBM / MQ: ≥ 9.2.0.0; ≤ 9.2.0.44 (affected, semver); ≥ 9.3.0.0; ≤ 9.3.0.42 (affected, semver); ≥ 9.4.0.0; ≤ 9.4.0.26 (affected, semver); ≥ 9.4.0.0; ≤ 9.4.5.1 (affected, semver); ≥ 10.0.0.0; ≤ 10.0.0.5 (affected, semver). Source: CNA: ibm

## Severity and prioritization

- CVSS 3.1: 8.1 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N; source: CNA: ibm

- CVSS 3.1: 8.1 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N; source: NVD: psirt@us.ibm.com

- CISA KEV: No listing in collected sources

- EPSS: 0.23% as of 2026-11-09; percentile 13.71%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-611

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.ibm.com/support/pages/node/7294654 (CNA: ibm; vendor-advisory, patch)

- https://www.ibm.com/support/pages/node/7294654 (psirt@us.ibm.com)

## Provenance

- CNA: ibm: https://www.cve.org/CVERecord?id=CVE-2026-13271; retrieved 2026-11-09; source updated 2026-11-09

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-13271; retrieved 2026-11-05; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-13271; retrieved 2026-11-09; source updated Not reported

Revision: 7f1696f2f34bbf6308ce07b8efe0003f926bad6662f1c1dc5588a9ed68c130de

Canonical: https://y2.dev/cve/CVE-2026-13271

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