CVE-2026-8858
WebSphere Application Server Remote Code Execution
CVSS Score
7.5
EPSS Score
0.3%
EPSS Percentile
17th
IBM WebSphere Application Server and IBM WebSphere Application Server Liberty are vulnerable to remote code execution and denial of service in the WebSphere Web Server Plug-in component. This vulnerability can be exploited when an attacker impersonates the application server and sends crafted responses to the plug-in.
| CWE | CWE-94 |
| Vendor | ibm |
| Product | websphere application server |
| Published | Jun 22, 2026 |
| Last Updated | Jul 9, 2026 |
Stay Ahead of the Next One
Get instant alerts for ibm websphere application server
Be the first to know when new high vulnerabilities affecting ibm websphere application server are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
IBM / WebSphere Application Server
8.5 9.0