CVE-2026-8400: IBM WebSphere Application Server

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSphere Application Server - Liberty Continuous delivery has a flaw in the ORB component in IBM SDK, Java Technology Edition, may allow a malicious IIOP server to induce loading and instantation of arbitrary classes.

Affected products

• IBM WebSphere Application Server: affected versions not specified; version 8.5.0.0 only; version 9.0.0.0 only

Published 2026-08-05. Last modified 2026-08-10.