What is CVE-2026-12150?

CVE-2026-12150 is a high-severity vulnerability in IBM Mq, classified under Stack-based Buffer Overflow. CVSS score: 7.0/10. Published 2026-09-15.

How severe is CVE-2026-12150?

High severity. CVSS v3 base score is 7.0 out of 10.

Buffer overflow in IBM Mq

CVE-2026-12150

IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 could allow a remote attacker with a trusted TLS client certificate to cause a denial of service and potentially affect memory contents due to improper validation of deeply nested certificate data during TLS certificate processing.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H.

Affected products

Ibm Mq — versions 10.0.0.0

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

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

Frequently asked questions

What is CVE-2026-12150?: CVE-2026-12150 is a high-severity vulnerability in IBM Mq, classified under Stack-based Buffer Overflow. CVSS score: 7.0/10. Published 2026-09-15.
How severe is CVE-2026-12150?: High severity. CVSS v3 base score is 7.0 out of 10.