CVE-2026-11711 IBM WebSphere Application Server prior to 9.0.5.29 and 8.5.5.31 are affected by multiple vulnerabilities
Attackers can execute arbitrary code via deserialization flaws in the Name Service component of 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-2026-11711?
CVE-2026-11711 is a medium-severity unsafe deserialization vulnerability in IBM WebSphere Application Server, published on 18 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 affected by a deserialization vulnerability in the Name Service component.
Weakness: CWE-502
Which versions are affected by CVE-2026-11711?
How do I fix CVE-2026-11711?
No fix has been published for CVE-2026-11711 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-2026-11711 being exploited?
There is no known exploitation of CVE-2026-11711 in the wild and no public exploit code.
Sources
Also known as GHSA-qxf8-2p95-9hvv.