IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities when using when using Web Server Plug-ins
Summary
| CVE | CVE-2026-8633 |
|---|---|
| State | PUBLISHED |
| Assigner | ibm |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-26 18:16:56 UTC |
| Updated | 2026-05-27 18:12:04 UTC |
| Description | IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5, 9.0 IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to remote code execution in the Web Server Plug-ins, through a specially crafted request. |
Risk And Classification
Primary CVSS: v3.1 9.8 CRITICAL from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.001980000 probability, percentile 0.415940000 (date 2026-05-27)
Problem Types: CWE-94 | CWE-94 CWE-94 Improper Control of Generation of Code ('Code Injection')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Ibm | Websphere Application Server | All | All | All | All |
| Application | Ibm | Websphere Application Server | All | All | All | All |
| Application | Ibm | Websphere Application Server | All | All | All | All |
| Application | Ibm | Websphere Application Server | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | IBM | Web Server Plug-ins For WebSphere Application Server And WebSphere Liberty | affected 8.5, 9.0 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.ibm.com/support/pages/node/7274072 | [email protected] | www.ibm.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
Solutions
CNA: IBM strongly recommends addressing the vulnerability now by applying a currently available Web Server Plug-ins interim fix or fix pack that contains the fix for APAR PH71342. Web Server Plug-ins for IBM WebSphere Application Server (used with either WebSphere Application Server traditional or Liberty): For V9.0.0.0 through 9.0.5.27: · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Web Server Plug-ins Interim Fix that resolves PH71342 https://www.ibm.com/support/pages/node/7273976 --OR-- · Apply Web Server Plug-ins Fix Pack 9.0.5.28 or later (targeted availability 2Q2026). For V8.5.0.0 through 8.5.5.29: · Upgrade to minimal fix pack levels as required by interim fix and then apply Web Server Plug-ins Interim Fix that resolves PH71342 https://www.ibm.com/support/pages/node/7273976 --OR-- · Apply Web Server Plug-ins Fix Pack 8.5.5.30 or later (targeted availability 3Q2026). Additional interim fixes may be available and linked off the interim fix download page.