Quick answers
- Is CVE-2026-11381 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-11381 being exploited in the wild.
- How severe is CVE-2026-11381?
- High severity, with a CVSS score of 8.8, published 18 September 2026.
- Which products and versions are affected?
- IBM MQ for HPE NonStop 8.1.0.0 through 8.1.0.40.
- Is there a fix for CVE-2026-11381?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-11381 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-11381?
- Check whether you run IBM MQ for HPE NonStop at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A heap-based buffer overflow (CWE-122) in IBM MQ's handling of distribution list structures allows authenticated network attackers to trigger denial of service or arbitrary code execution without user interaction. The vulnerability stems from inadequate input validation when processing specially crafted distribution list messages. A fix is available via CSU 8.1.0.41 for IBM MQ V8.1 on HPE NonStop.
Affected products
- IBM MQ for HPE NonStop 8.1.0.0 through 8.1.0.40
Timeline
- 2026-09-17: disclosed