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CVE-2026-18142

IBM MQ is affected by a denial of service vulnerability

High7.1EPSS 0.43%
Published
Updated
Reserved
Assigned by
ibm

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.

Scores

CVSS scores of CVE-2026-18142, by who scored it
Scored byCVSSScoreVector
ibmCNA (assigner)3.1High7.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
NVDNVD · Undergoing Analysis3.1High7.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
EPSS (exploitation in 30 days)
0.43% · top 63% of all CVEs (6 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.

Weakness

Affected products

  • IBM · MQ

    • affected 9.2.0.0 – ≤ 9.2.0.44
    • affected 9.3.0.0 – ≤ 9.3.0.42
    • affected 9.4.0.0 – ≤ 9.4.0.26
    • affected 9.4.0.0 – ≤ 9.4.5.1
    • affected 10.0.0.0 – ≤ 10.0.0.5

What to do

Solution: This issue was addressed under Known Issue DT500561. 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

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

CVE-2026-18142 badge
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Record last updated .