CVE-2026-19645 Multiple vulnerabilities in IBM MQ Agent images
Authenticated users can exhaust IBM MQ Agent worker pools with expensive requests, causing denial of service for other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19645?
CVE-2026-19645 is a medium-severity denial of service vulnerability in IBM MQ Agent, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-400
Which versions are affected by CVE-2026-19645?
How do I fix CVE-2026-19645?
No fix has been published for CVE-2026-19645 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-19645 being exploited?
There is no known exploitation of CVE-2026-19645 in the wild and no public exploit code.
Sources
Also known as GHSA-x7m8-9qr5-36gh.