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Vulnerability · Published Nov 4, 2026 · Assigned by ibm

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

High 8.1

In plain English

A high-severity XML external entity in MQ from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.2%top 86.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
IBM MQ 9.2.0.0 – through 9.2.0.449.3.0.0 – through 9.3.0.429.4.0.0 – through 9.4.0.269.4.0.0 – through 9.4.5.110.0.0.0 – through 10.0.0.5

Weakness: CWE-611 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References