CVE-2026-11726 IBM MQ for HPE NonStop is vulnerable to a denial of service issue
An authenticated attacker can cause a denial of service or obtain sensitive information in IBM MQ for HPE NonStop due to improper validation of message header offsets.
- 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-2026-11726?
CVE-2026-11726 is a high-severity denial of service vulnerability in IBM MQ for HPE NonStop, 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 for HPE NonStop 8.1.0 through 8.1.0.40 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header offset values.
Weakness: CWE-125
Which versions are affected by CVE-2026-11726?
How do I fix CVE-2026-11726?
No fix has been published for CVE-2026-11726 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-11726 being exploited?
There is no known exploitation of CVE-2026-11726 in the wild and no public exploit code.
Sources
Also known as GHSA-6r76-w3vq-7277.