CVE-2019-4261 Denial of service in MQ
Attackers can cause a denial of service in IBM MQ by sending specially crafted messages, disrupting messaging services.
- 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-2019-4261?
CVE-2019-4261 is a medium-severity denial of service vulnerability in Ibm Mq, published on 5 Aug 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM WebSphere MQ V7.1, 7.5, IBM MQ V8, IBM MQ V9.0LTS, IBM MQ V9.1 LTS, and IBM MQ V9.1 CD are vulnerable to a denial of service attack caused by specially crafted messages. IBM X-Force ID: 160013.
Which versions are affected by CVE-2019-4261?
It affects 2 products.
Products include Ibm Mq, Ibm Websphere Mq.
How do I fix CVE-2019-4261?
No fix has been published for CVE-2019-4261 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-2019-4261 being exploited?
There is no known exploitation of CVE-2019-4261 in the wild and no public exploit code.
Other vulnerabilities in Ibm Mq
- CVE-2026-10575 IBM MQ queue manager is vulnerable to remote code execution
- CVE-2026-11375 IBM MQ queue manager is vulnerable to remote code execution
- CVE-2026-11378 IBM MQ queue manager is vulnerable to remote code execution
- CVE-2022-22489 XML external entity in MQ
- CVE-2026-10027 IBM MQ queue manager is vulnerable to unauthenticated remote code execution
Sources
Also known as GHSA-25fw-rhx6-pmwr.