CVE-2026-77816

IBM WebSphere Application Server Liberty Improper Certificate Validation

Published Oct 13, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.9 administrative client could allow man-in-the-middle attacks. An attacker could exploit this vulnerability to obtain sensitive information.

Remediation

Vendor Solution

IBM strongly recommends addressing the vulnerabilities now by applying the fix pack(s) listed below. For IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.9: · Apply Liberty Fix Pack 26.0.0.10 https://www.ibm.com/support/pages/node/7289741 (availability October 2026) or later fix pack.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Ibm websphere Application Server Liberty
Vendors & Products Ibm websphere Application Server Liberty
Type Values Removed Values Added
Description IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.9 administrative client could allow man-in-the-middle attacks. An attacker could exploit this vulnerability to obtain sensitive information.
Title IBM WebSphere Application Server Liberty Improper Certificate Validation
First Time appeared Ibm
Ibm websphere Application Server Liberty
Weaknesses CWE-295
CPEs cpe:2.3:a:ibm:websphere_application_server_liberty:17.0.0.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server_liberty:26.0.0.9:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm websphere Application Server Liberty
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ibm
Published
Updated
Oct 14, 2026, 4:54 PM
Reserved
Aug 21, 2026, 2:21 PM
Status
Awaiting Analysis
Published
Oct 13, 2026, 9:18 PM
Modified
Oct 14, 2026, 5:19 PM