Resource exhaustion in IBM Mq Agent

CVE-2026-19645

IBM MQ Agent CD: v1.0.0, v1.0.1, v2.0.0, v2.0.1 An authenticated user with a valid session cookie can submit arbitrarily large or computationallyexpensive requests that cause the LLM agent workers to be held for extended periods — rangingfrom tens of seconds to over ten minutes per request. When multiple such requests are sentconcurrently, the agent worker pool becomes exhausted, causing all other IBM MQ Console users toexperience degraded performance or complete unavailability of the AI Agent feature.

Vulnerability class: DoS (Denial of Service)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (20.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-19645: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • IBM Mq Agent — versions CD: v1.0.0, v1.0.1, v2.0.0, v2.0.1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-19645?
CVE-2026-19645 is a medium-severity vulnerability in IBM Mq Agent, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-09-04.
How severe is CVE-2026-19645?
Medium severity. CVSS v3 base score is 6.5 out of 10.