CVE-2026-11378 IBM MQ queue manager is vulnerable to remote code execution
An authenticated attacker can exploit an integer overflow in IBM MQ to execute arbitrary code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-11378?
CVE-2026-11378 is a high-severity vulnerability in Ibm Mq, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM MQ could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to an integer overflow in distribution list processing.
Weakness: CWE-190
Which versions are affected by CVE-2026-11378?
It affects 1 product.
Products include Ibm Mq.
How do I fix CVE-2026-11378?
No fix has been published for CVE-2026-11378 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-11378 being exploited?
There is no known exploitation of CVE-2026-11378 in the wild and no public exploit code.
Other vulnerabilities in Ibm Mq
- CVE-2026-10575 IBM MQ queue manager is vulnerable to remote code execution
- CVE-2026-11375 IBM MQ queue manager is vulnerable to remote code execution
- CVE-2022-22489 XML external entity in MQ
- CVE-2026-10027 IBM MQ queue manager is vulnerable to unauthenticated remote code execution
- CVE-2020-4682 Deserialization in MQ
Sources
Also known as GHSA-3qp5-vm6w-4rrg.