CVE-2026-9336 IBM WebSphere Application Server prior to 9.0.5.29 and 8.5.5.31 are affected by multiple vulnerabilities
Remote attackers can cause denial of service by exhausting filesystem space via crafted HTTP requests to administrative endpoints in IBM WebSphere Application Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-9336?
CVE-2026-9336 is a medium-severity denial of service vulnerability in Ibm Websphere Application Server, published on 10 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to a denial of service, caused by sending a specially-crafted HTTP request to an administrative endpoint. A remote attacker could exploit this vulnerability to cause the server to exhaust filesystem space.
Weakness: CWE-306
Which versions are affected by CVE-2026-9336?
It affects 1 product.
Products include Ibm Websphere Application Server.
How do I fix CVE-2026-9336?
No fix has been published for CVE-2026-9336 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-2026-9336 being exploited?
There is no known exploitation of CVE-2026-9336 in the wild and no public exploit code.
Other vulnerabilities in Ibm Websphere Application Server
Sources
Also known as GHSA-fw6w-g4f4-936x.