What is CVE-2026-11729?

CVE-2026-11729 is a high-severity vulnerability in IBM Mq, classified under Deserialization of Untrusted Data. CVSS score: 8.5/10. Published 2026-09-15.

How severe is CVE-2026-11729?

High severity. CVSS v3 base score is 8.5 out of 10.

Deserialization in IBM Mq

CVE-2026-11729

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 an authenticated attacker to execute arbitrary code in client applications due to unsafe deserialization that enables JNDI injection attacks.

Vulnerability class: Insecure Deserialization

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Ibm Mq — versions 10.0.0.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

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

Frequently asked questions

What is CVE-2026-11729?: CVE-2026-11729 is a high-severity vulnerability in IBM Mq, classified under Deserialization of Untrusted Data. CVSS score: 8.5/10. Published 2026-09-15.
How severe is CVE-2026-11729?: High severity. CVSS v3 base score is 8.5 out of 10.