IBM MQ · CVE-2026-13271 · Package
FIX → 9.2.0.46 · 9.3.0.43 · 9.4.0.30 · 10.0.0.6 ✓ verified
IBM MQ's Managed File Transfer component does not restrict XML external entity references when processing command queue messages. An authenticated attacker can read sensitive information or cause a denial of service.
first public Nov 4, 2026 · 2 sources
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Teams running IBM MQ with the Managed File Transfer component in the listed version ranges are exposed, since the flaw sits in command queue processing. The attacker must already hold valid credentials. Installations outside the listed ranges, or without Managed File Transfer, are not described as affected.
Not affected if auth-required, default-config, no-managed-file-transfer
Who cares enterprise-messaging, ibm-mq, managed-file-transfer, self-hosted, xxe
9.2.0.0-9.2.0.44 LTS, 9.3.0.0-9.3.0.42 LTS, 9.4.0.0-9.4.0.26 LTS, 9.4.0.0-9.4.5.1 CD, 10.0.0.0-10.0.0.5 LTS and CDIBM 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.
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Upgrade to 9.2.0.46 · 9.3.0.43 · 9.4.0.30 · 10.0.0.6
Apply per branch: 9.2 LTS cumulative security update 9.2.0.46; 9.3 LTS 9.3.0.43; 9.4 LTS fix pack 9.4.0.30; 10.0 LTS upgrade to 10.0.0.6; 9.4 CD and 10.0 CD upgrade to 10.0.1.0 (IBM known issue DT474627).