What is CVE-2026-10027?

CVE-2026-10027 is a high-severity vulnerability in IBM Mq, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2026-09-18.

How severe is CVE-2026-10027?

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

Buffer overflow in IBM Mq

CVE-2026-10027

IBM MQ could allow a remote attacker to cause a denial of service or execute arbitrary code due to a buffer overflow when processing malformed compressed data on channels configured with compression enabled.

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 — versions 10.0.0.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2026-10027?: CVE-2026-10027 is a high-severity vulnerability in IBM Mq, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2026-09-18.
How severe is CVE-2026-10027?: High severity. CVSS v3 base score is 8.1 out of 10.