CVE-2026-18142 PUBLISHED

IBM MQ is affected by a denial of service vulnerability

Assigner: ibm
Reserved: 28.07.2026 Published: 04.11.2026 Updated: 04.11.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
CVSS Score: 7.1

Product Status

Vendor IBM
Product MQ
Versions
  • affected from 9.2.0.0 to 9.2.0.44 (incl.)
  • affected from 9.3.0.0 to 9.3.0.42 (incl.)
  • affected from 9.4.0.0 to 9.4.0.26 (incl.)
  • affected from 9.4.0.0 to 9.4.5.1 (incl.)
  • affected from 10.0.0.0 to 10.0.0.5 (incl.)

Solutions

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

Problem Types

  • CWE-190 Integer Overflow or Wraparound CWE