CVE-2026-15328: IBM WebSphere Application Server

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

IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty is vulnerable to HTTP request smuggling.

Affected products

• IBM WebSphere Application Server: from 8.5.0.0, before 8.5.5.31 (fixed in 8.5.5.31); from 9.0.0.0, before 9.0.5.29 (fixed in 9.0.5.29); from 17.0.0.3, before 26.0.0.8 (fixed in 26.0.0.8)

Published 2026-07-28. Last modified 2026-09-23.