CVE-2026-9330
High
Description
IBM WebSphere Application Server 9.0, and 8.5 is affected by an improper validation of user-supplied data during deserialization using the SAML Web Single Sign-On component. This could result in remote code execution via a crafted HTTP request when combined with a suitable gadget chain.
SeverityHigh
CVSS8.5
Exploit probability—
Product
Ibm Websphere Application Server
PublishedJun 1, 2026
First seenJun 1, 2026
Weakness typeCWE-502Deserialization of untrusted data
How to fix
Update
- ibm websphere_application_server8.5.5.30, 9.0.5.29 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ibm websphere_application_server | 8.5.0.0 ≤ v < 8.5.5.30, 9.0.0.0 ≤ v < 9.0.5.29 | 8.5.5.30, 9.0.5.29 |
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