EUVD-2026-78873
GHSA-8mq2-hm2c-3ccx
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
2DescriptionNVD
IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 Classes for Java could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to XML external entity injection in MQRFH2 header processing.
AnalysisAI
IBM MQ message queueing middleware fails to properly restrict XML external entity resolution while processing MQRFH2 message headers, letting an authenticated queue user read server-side files or resources and drive the broker and its Java clients into a denial-of-service state. Affected releases span the 9.1.x, 9.2.x, 9.3.x and 9.4.x LTS/CD streams plus 10.0.0.0 Classes for Java, so any environment running the JMS/XMS or Java messaging client against a current broker is in scope. …
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