What is CVE-2026-10747?

CVE-2026-10747 is a critical-severity vulnerability in IBM Mq Appliance, classified under Heap-based Buffer Overflow. CVSS score: 10.0/10. Published 2026-09-18.

How severe is CVE-2026-10747?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Buffer overflow in IBM Mq Appliance

CVE-2026-10747

IBM MQ Appliance could allow a remote attacker to cause a denial of service or potentially execute arbitrary code due to a heap buffer overflow in protocol message processing before authentication.

Vulnerability class: Buffer Overflow

Published 2026-09-18 · last modified 2026-09-21.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (61.1th percentile), scored 2026-11-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.009 · change: +0.004

Affected products

IBM Mq Appliance

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

www.ibm.com/support/pages/node/7284690 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-10747?: CVE-2026-10747 is a critical-severity vulnerability in IBM Mq Appliance, classified under Heap-based Buffer Overflow. CVSS score: 10.0/10. Published 2026-09-18.
How severe is CVE-2026-10747?: Critical severity. CVSS v3 base score is 10.0 out of 10.