Live › vulnerability › CVE-2026-12343
Go to dashboardIBM MQ Operator does not properly validate RFH2 message header fields in queued publish/subscribe operations. An authenticated attacker can send a crafted message to cause a denial of service.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Teams running IBM MQ Operator in the affected version ranges, where queued publish/subscribe traffic reaches the queue manager from authenticated clients. The sources do not say more about which deployments are most exposed. Teams on versions outside the listed ranges can skip it.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| ibm mq operator | vendor | >= 2.0.0, <= 2.0.29 | – |
| ibm mq operator | vendor | >= 3.2.0, <= 3.2.29 | – |
| ibm mq operator | vendor | = 3.3.0 | – |
| ibm mq operator | vendor | = 3.4.0 | – |
| ibm mq operator | vendor | = 3.4.1 | – |
| ibm mq operator | vendor | = 3.5.0 | – |
| ibm mq operator | vendor | = 3.5.1 | – |
| ibm mq operator | vendor | = 3.5.2 | – |
| ibm mq operator | vendor | = 3.5.3 | – |
| ibm mq operator | vendor | = 3.6.0 | – |
| ibm mq operator | vendor | = 3.6.1 | – |
| ibm mq operator | vendor | = 3.6.2 | – |
| ibm mq operator | vendor | = 3.6.3 | – |
| ibm mq operator | vendor | = 3.6.4 | – |
| ibm mq operator | vendor | = 3.7.0 | – |
| ibm mq operator | vendor | = 3.7.1 | – |
| ibm mq operator | vendor | = 3.7.2 | – |
| ibm mq operator | vendor | = 3.8.0 | – |
| ibm mq operator | vendor | = 3.8.1 | – |
| ibm mq operator | vendor | = 3.9.0 | – |
| ibm mq operator | vendor | = 3.9.1 | – |
| ibm mq operator | vendor | = 3.9.2 | – |
| ibm mq operator | vendor | = 4.0.0 | – |
| ibm mq operator | vendor | = 4.0.1 | – |
| ibm mq operator | vendor | = 4.0.2 | – |
| ibm mq operator | vendor | = 4.0.3 | – |
| ibm mq operator | vendor | = 4.0.4 | – |
| ibm supplied mq advanced container images | vendor | = 9.4.1.0 | – |
| ibm supplied mq advanced container images | vendor | = 9.4.1.1 | – |
| ibm supplied mq advanced container images | vendor | = 9.4.2.0 | – |
| ibm supplied mq advanced container images | vendor | = 9.4.2.1 | – |
| ibm supplied mq advanced container images | vendor | = 9.4.3.0 | – |
| ibm supplied mq advanced container images | vendor | = 9.4.3.1 | – |
| ibm supplied mq advanced container images | vendor | = 9.4.4.0 | – |
| ibm supplied mq advanced container images | vendor | = 9.4.4.1 | – |
| ibm supplied mq advanced container images | vendor | = 9.4.5.0 | – |
| ibm supplied mq advanced container images | vendor | = 9.4.5.1 | – |
| ibm supplied mq advanced container images | vendor | = 10.0.0.0 | – |
| ibm supplied mq advanced container images | vendor | = 10.0.0.5 | – |
| ibm supplied mq advanced container images | vendor | = 9.3.0.0 | – |
2.0.0 to 2.0.29, 3.2.0 to 3.2.29, and 3.3.0 to 3.6.2 (listed specific releases).Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
IBM MQ could allow an authenticated attacker to cause a denial of service due to improper validation of RFH2 message header fields in queued publish/subscribe operations.
This page as .md · .json · in your agent: get_signal("CVE-2026-12343")
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.