CVE-2026-9320 IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities
A remote attacker can cause memory exhaustion and denial of service in IBM WebSphere Application Server by sending a specially-crafted request.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-9320?
CVE-2026-9320 is a medium-severity denial of service vulnerability in Ibm Websphere Application Server, published on 22 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume memory resources.
Weakness: CWE-400
Which versions are affected by CVE-2026-9320?
It affects 1 product.
Products include Ibm Websphere Application Server.
How do I fix CVE-2026-9320?
No fix has been published for CVE-2026-9320 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-2026-9320 being exploited?
There is no known exploitation of CVE-2026-9320 in the wild and no public exploit code.
Other vulnerabilities in Ibm Websphere Application Server
Sources
Also known as GHSA-j7mw-rcxc-j56c.