CVE-2026-105443

IBM WebSphere Application Server Liberty is affected by an improper access control

Published Oct 13, 2026 CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
Description
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.10 has insufficient isolation between servers sharing an install.

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 DT503659. 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 restConnector-1.0 or restConnector-2.0 feature(s):  · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves DT503659 https://www.ibm.com/support/pages/node/7292198 --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
Metrics ssvc

{'options': {'Automatable': 'no', '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 has insufficient isolation between servers sharing an install.
Title IBM WebSphere Application Server Liberty is affected by an improper access control
First Time appeared Ibm
Ibm websphere Application Server Liberty
Weaknesses CWE-284
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': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ibm
Published
Updated
Oct 16, 2026, 5:16 PM
Reserved
Oct 5, 2026, 1:20 PM
Status
Awaiting Analysis
Published
Oct 13, 2026, 9:17 PM
Modified
Oct 16, 2026, 6:17 PM