CVE-2026-8858

HIGH

IBM i WebSphere Web Server Plug-in - Remote Code Execution and Denial of Service

Title source: manual
STIX 2.1

Description

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.

References (2)

Core 2
Core References
Vendor Advisory vendor-advisory patch
https://www.ibm.com/support/pages/node/7277344
Vendor Advisory vendor-advisory patch
https://www.ibm.com/support/pages/node/7276560

Scores

CVSS v3 7.5
EPSS 0.0026
EPSS Percentile 17.5%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-94
Status published
Products (7)
ibm/i 7.3 - 7.6
IBM/i 7.3.0
IBM/i 7.4.0
IBM/i 7.5.0
IBM/i 7.6.0 - 1.8.4
IBM/WebSphere Application Server 8.5
IBM/WebSphere Application Server 9.0
Published Jun 22, 2026
Tracked Since Jun 22, 2026