CVE-2026-9319 IBM WebSphere Application Server is affected by a remote code execution vulnerability
Attackers can execute arbitrary code remotely on IBM WebSphere Application Server by exploiting unsafe deserialization in JAX-WS endpoints.
- 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-2026-9319?
CVE-2026-9319 is a critical unsafe deserialization vulnerability in Ibm Websphere Application Server, published on 1 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 is vulnerable to potential remote code execution due to deserialization of untrusted data via JAX-WS endpoints with WS-Security.
Weakness: CWE-502
Which versions are affected by CVE-2026-9319?
It affects 1 product.
Products include Ibm Websphere Application Server.
How do I fix CVE-2026-9319?
No fix has been published for CVE-2026-9319 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-9319 being exploited?
There is no known exploitation of CVE-2026-9319 in the wild and no public exploit code.
Other vulnerabilities in Ibm Websphere Application Server
Sources
Also known as GHSA-rqhj-2grh-m6c2.