What is CVE-2026-11727?

CVE-2026-11727 is a high-severity vulnerability in IBM Mq For HPE Nonstop, classified under Heap-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-09-18.

How severe is CVE-2026-11727?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in IBM Mq For HPE Nonstop

CVE-2026-11727

IBM MQ for HPE NonStop 8.1.0 through 8.1.0.40 IBM MQ C client could allow a remote attacker to cause a denial of service or potentially execute arbitrary code due to improper validation of queue manager responses when requesting AMS policy data.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/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-2026-11727?: CVE-2026-11727 is a high-severity vulnerability in IBM Mq For HPE Nonstop, classified under Heap-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-09-18.
How severe is CVE-2026-11727?: High severity. CVSS v3 base score is 8.1 out of 10.