IBM WebSphere Application Server Liberty is affected by identity spoofing
Summary
| CVE | CVE-2026-3621 |
|---|---|
| State | PUBLISHED |
| Assigner | ibm |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-04-23 00:16:45 UTC |
| Updated | 2026-05-13 20:24:13 UTC |
| Description | IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.4 IBM WebSphere Application Server Liberty is vulnerable to identity spoofing under limited conditions when an application is deployed without authentication and authorization configured. |
Risk And Classification
Primary CVSS: v3.1 5.9 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.000390000 probability, percentile 0.116730000 (date 2026-05-21)
Problem Types: CWE-269 | NVD-CWE-noinfo | CWE-269 CWE-269 Improper Privilege Management
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Ibm | Websphere Application Server | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | IBM | WebSphere Application Server - Liberty | affected 17.0.0.3 26.0.0.4 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.ibm.com/support/pages/node/7270437 | [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 interim fix or fix pack that contains the fix for APAR PH70352. IBM WebSphere Application Server Liberty is affected by identity spoofing only when the appSecurity feature (appSecurity-1.0, appSecurity-2.0, appSecurity-3.0, appSecurity-4.0, or appSecurity-5.0) is not enabled on the server. To determine if a feature is enabled for IBM WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature https://www.ibm.com/support/pages/node/6553910 . For IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.4: · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH70352 https://www.ibm.com/support/pages/node/7270436 --OR-- · Apply Liberty Fix Pack 26.0.0.5 or later (targeted availability 2Q2026). Additional interim fixes may be available and linked off the interim fix download page.