CVE-2026-77816

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IBM WebSphere Liberty Admin Client MITM Vulnerability

Publication date: 2026-10-13

Last updated on: 2026-10-14

Assigner: IBM Corporation

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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-14

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-77816

EUVD

EUVD-2026-100488

Affected Vendors & Products

Vendor	Product	Version / Range
IBM	WebSphere	Application Server - Liberty 17.0.0.3

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-295	The product does not validate, or incorrectly validates, a certificate.

Attack-Flow Graph

Executive Summary

This vulnerability in IBM WebSphere Application Server - Liberty allows a man-in-the-middle attacker to intercept and potentially obtain sensitive information transmitted between the administrative client and the server. It affects versions 17.0.0.3 through 26.0.0.9.

Impact Analysis

An attacker could exploit this to steal sensitive data such as credentials or configuration details during administrative operations. This may lead to unauthorized access or further attacks on the system.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, potentially violating GDPR (data protection) and HIPAA (health information privacy) requirements. Organizations may face compliance violations if exploited.

Mitigation Strategies

Update IBM WebSphere Application Server - Liberty to version 26.0.0.10 or later to address the vulnerability.

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