CVE-2026-18499: IBM WebSphere Application Server

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 is vulnerable to a privilege escalation when using Liberty collectives.

Affected products

• IBM WebSphere Application Server: from 17.0.0.3, before 26.0.0.9 (fixed in 26.0.0.9)

Published 2026-08-12. Last modified 2026-08-17.