What is CVE-2026-11381?

CVE-2026-11381 is a high-severity vulnerability in IBM Mq For HPE Nonstop, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-09-18.

How severe is CVE-2026-11381?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in IBM Mq For HPE Nonstop

CVE-2026-11381

IBM MQ could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to improper validation of message distribution list structures.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ibm Mq For Hpe Nonstop

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-11381?: CVE-2026-11381 is a high-severity vulnerability in IBM Mq For HPE Nonstop, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-09-18.
How severe is CVE-2026-11381?: High severity. CVSS v3 base score is 8.8 out of 10.