All vulnerabilities
CVE-2026-12670

MQ Operator: IBM MQ Denial of Service

IBM MQ Operator
Open in ThreatlineRecord JSON
CVSS
5.3Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.4.0Fixed versionCVE List
Published19 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

IBM MQ could allow an authenticated attacker to cause a denial of service through a specially crafted message that triggers excessive memory operations during character set conversion.

Text from CVE List

Affected versions 48

  • MQ Operatoraffected: 3.2.0 through 3.2.29CVE List
  • MQ Operatoraffected: 3.3.0 before 3.4.0CVE List
  • MQ Operatoraffected: 3.4.1CVE List
  • MQ Operatoraffected: 3.5.0CVE List
  • MQ Operatoraffected: 3.5.1 through 3.5.3CVE List
  • MQ Operatoraffected: 3.6.0 through 3.6.4CVE List
  • MQ Operatoraffected: 3.7.0 through 3.7.2CVE List
  • MQ Operatoraffected: 3.8.0CVE List
  • MQ Operatoraffected: 3.8.1CVE List
  • MQ Operatoraffected: 3.9.0CVE List
  • MQ Operatoraffected: 3.9.1CVE List
  • MQ Operatoraffected: 3.9.2CVE List
  • MQ Operatoraffected: 4.0.0CVE List
  • MQ Operatoraffected: 4.0.1CVE List
  • MQ Operatoraffected: 4.0.2CVE List
  • MQ Operatoraffected: 4.0.3CVE List
  • MQ Operatoraffected: 4.0.4CVE List
  • MQ Operatoraffected: 2.0.0 through 2.0.29CVE List
  • MQ Advanced container imagesaffected: 9.4.0.6-r1 through r1, 9.4.0.6-r2, 9.4.0.7-r1, 9.4.0.10-r1, 9.4.0.10-r2, 9.4.0.11-r1, 9.4.0.11-r2, 9.4.0.11-r3, 9.4.0.12-r1, 9.4.0.15-r1 - 9.4.0.15-r4, 9.4.0.16-r1, 9.4.0.16-r2, 9.4.0.17-r1, 9.4.0.17-r2, 9.4.0.20-r1, 9.4.0.21-r1, 9.4.0.21-r2, 9.4.0.25-r1 - 9.4.0.25-r3, 9.4.0.26-r1CD: 9.4.1.0-r1, 9.4.1.0-r2, 9.4.1.1-r1, 9.4.2.0-r1, 9.4.2.0-r2, 9.4.2.1-r1, 9.4.2.1-r2, 9.4.3.0-r1, 9.4.3.0-r2, 9.4.3.1-r1 - 9.4.3.1-r3, 9.4.4.0-r1 - 9.4.4.0-r4, 9.4.4.1-r1, 9.4.5.0-r1, 9.4.5.0-r2, 9.4.5.1-r1, 10.0.0.0-r1 - 10.0.0.0-r4, 10.0.0.5-r1LTS: 9.3.0.0-r1, 9.3.0.0-r2, 9.3.0.0-r3, 9.3.0.1-r1, 9.3.0.1-r2, 9.3.0.1-r3, 9.3.0.1-r4, 9.3.0.3-r1, 9.3.0.4-r1, 9.3.0.4-r2, 9.3.0.5-r1, 9.3.0.5-r2, 9.3.0.5-r3, 9.3.0.6-r1, 9.3.0.10-r1, 9.3.0.10-r2, 9.3.0.11-r1,9.3.0.11-r2, 9.3.0.15-r1, 9.3.0.16-r1, 9.3.0.16-r2, 9.3.0.17-r1, 9.3.0.17-r2, 9.3.0.17-r3, 9.3.0.20-r1, 9.3.0.20-r2, 9.3.0.21-r1, 9.3.0.21-r2, 9.3.0.21-r3, 9.3.0.25-r1, 9.4.0.0-r1, 9.4.0.0-r2, 9.4.0.0-r3, 9.4.0.5-r1, 9.4.0.5-r2CVE List
  • MQ Advanced container imagesaffected: 9.4.0.6-r2CVE List
  • MQ Advanced container imagesaffected: 9.4.0.7-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.0.10-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.0.10-r2CVE List
  • MQ Advanced container imagesaffected: 9.4.0.11-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.0.11-r2CVE List
  • MQ Advanced container imagesaffected: 9.4.0.11-r3CVE List
  • MQ Advanced container imagesaffected: 9.4.0.12-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.0.15-r1 through 9.4.0.15-r4CVE List
  • MQ Advanced container imagesaffected: 9.4.0.16-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.0.16-r2CVE List
  • MQ Advanced container imagesaffected: 9.4.0.17-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.0.17-r2CVE List
  • MQ Advanced container imagesaffected: 9.4.0.20-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.0.21-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.0.21-r2CVE List
  • MQ Advanced container imagesaffected: 9.4.0.25-r1 through 9.4.0.25-r3CVE List
  • MQ Advanced container imagesaffected: 9.4.0.26-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.1.0-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.1.0-r2CVE List
  • MQ Advanced container imagesaffected: 9.4.1.1-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.2.0-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.2.0-r2CVE List
  • MQ Advanced container imagesaffected: 9.4.2.1-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.2.1-r2CVE List
  • MQ Advanced container imagesaffected: 9.4.3.0-r1CVE List
  • MQ Advanced container imagesaffected: 9.4.3.0-r2CVE List
  • MQ Advanced container imagesaffected: 9.4.3.1-r1 through 9.4.3.1-r3CVE List
  • MQ Advanced container imagesaffected: 9.4.4.0-r1CVE List

References 1