CVE-2026-11829 IBM MQ Buffer Overflow
An authenticated attacker can cause a denial of service in IBM MQ by exploiting improper validation of offset values in MQOPEN requests.
- 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-2026-11829?
CVE-2026-11829 is a medium-severity memory corruption vulnerability in IBM MQ Advanced container images, published on 19 Oct 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 due to improper validation of offset values in MQOPEN requests.
Weakness: CWE-120
Which versions are affected by CVE-2026-11829?
It affects 2 products.
Products include Ibm Mq Operator, Ibm Supplied Mq Advanced Container Images.
How do I fix CVE-2026-11829?
No fix has been published for CVE-2026-11829 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-11829 being exploited?
There is no known exploitation of CVE-2026-11829 in the wild and no public exploit code.
Other vulnerabilities in IBM MQ Advanced container images
Sources
Also known as GHSA-r558-qrg5-2jq5.