CVE-2020-4267 Denial of service in MQ Appliance
An authenticated user can cause a denial of service in IBM MQ via a memory leak, requiring administrators to apply vendor patches.
- 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-2020-4267?
CVE-2020-4267 is a medium-severity denial of service vulnerability in Ibm Mq, published on 24 Apr 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM MQ and MQ Appliance 8.0, 9.1 LTS, and 9.1 CD could allow an authenticated user cause a denial of service due to a memory leak. IBM X-Force ID: 175840.
Weakness: CWE-401
Which versions are affected by CVE-2020-4267?
It affects 2 products.
Products include Ibm Mq, Ibm Mq Appliance.
How do I fix CVE-2020-4267?
No fix has been published for CVE-2020-4267 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-2020-4267 being exploited?
There is no known exploitation of CVE-2020-4267 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-pvcg-m8c9-58wj.