CVE-2026-8858CWE-94

WebSphere Application Server Remote Code Execution

High · published June 22, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
34.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00410 · 34.1th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2026-06-22T14:16Z
EPSS history
Timeline
  • 22 JUN 14:16Z
    WebSphere Application Server Remote Code Execution
    cvelistv5