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Vulnerability · Published Nov 4, 2026 · Assigned by ibm

CVE-2026-18142IBM MQ is affected by a denial of service vulnerability

High 7.1

In plain English

A high-severity integer overflow 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 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.4%top 62.9% 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 could allow a remote authenticated attacker to cause a denial of service and perform limited memory corruption due to an integer overflow.

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-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

References