CVE-2026-93909

IBM WebSphere Application Server Liberty is affected by an authentication bypass

Published Oct 13, 2026 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Description
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.10 is vulnerable by an authentication bypass vulnerability when samlWeb-2.0 feature is enabled.

Remediation

Vendor Solution

IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR DT502359. 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 - 26.0.0.10 using the samlWeb-2.0 feature:  · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves DT502359 https://www.ibm.com/support/pages/node/7291426 --OR-- · Apply Liberty Fix Pack 26.0.0.11 or later (targeted availability 4Q2026).  Additional interim fixes may be available and linked off the interim fix download page.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Ibm websphere Application Server
CPEs cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:*
Vendors & Products Ibm websphere Application Server
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.10 is vulnerable by an authentication bypass vulnerability when samlWeb-2.0 feature is enabled.
Title IBM WebSphere Application Server Liberty is affected by an authentication bypass
First Time appeared Ibm
Ibm websphere Application Server Liberty
Weaknesses CWE-384
CPEs cpe:2.3:a:ibm:websphere_application_server_liberty:17.0.0.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server_liberty:26.0.0.10:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm websphere Application Server Liberty
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ibm
Published
Updated
Oct 14, 2026, 2:08 PM
Reserved
Sep 18, 2026, 8:50 PM
Status
Analyzed
Published
Oct 13, 2026, 9:19 PM
Modified
Oct 22, 2026, 6:56 PM