IBM MQ 9.3 LTS, 9.3 CD, 9.4 LTS, and 9.4 CD could allow an authenticated user to cause a denial of service due to the improper handling of invalid headers sent to the queue.
IBM MQ 9.3 LTS, 9.3 CD, 9.4 LTS, and 9.4 CD reveals potentially sensitive information in trace files that could be read by a local user when webconsole trace is enabled.