CVE-2026-11831

MEDIUM

Published Oct 19, 2026 Modified Oct 23, 2026 CWE-122

Description

IBM MQ could allow an authenticated attacker to cause a limited denial of service and obtain very limited information about process memory layout due to an out-of-bounds read when processing a specially crafted client request.

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CVSS v3.1 Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

EPSS — Exploit Prediction

0.0020

Probability of exploitation

0.10%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-122 CWE-122

Affected Products

Vendor	Product	Versions
ibm	mq_operator	2.0.0 — 2.0.29
ibm	mq_operator	3.2.0 — 3.2.29
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	mq_operator	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All
ibm	supplied_mq_advanced_container_images	All

References

Advisories & Patches

https://www.ibm.com/support/pages/node/7292667

Frequently Asked Questions

What is CVE-2026-11831? +

How severe is CVE-2026-11831? +

CVE-2026-11831 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0020, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-11831? +

CVE-2026-11831 affects products from ibm, specifically: mq_operator, supplied_mq_advanced_container_images. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-11831? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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