CVE-2026-93909
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Authentication Bypass in IBM WebSphere Liberty

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 26.0.0.10 is vulnerable by an authentication bypass vulnerability when samlWeb-2.0 feature is enabled.

CVSS Scores

EPSS Scores

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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-2026-93909
EUVD
EUVD-2026-100498

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
IBM WebSphere Application Server - Liberty 17.0.0.3

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-384 Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.

Attack-Flow Graph

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Executive Summary

IBM WebSphere Application Server Liberty versions 17.0.0.3 through 26.0.0.10 have an authentication bypass vulnerability when the samlWeb-2.0 feature is enabled. This allows attackers to bypass authentication mechanisms entirely.

Impact Analysis

This vulnerability allows unauthorized access to sensitive data or administrative functions. Attackers could impersonate legitimate users, gain elevated privileges, or perform actions without proper authentication. The high CVSS score indicates significant risk.

Compliance Impact

This vulnerability likely violates compliance requirements for data protection and access control. GDPR requires strong authentication and data protection measures, while HIPAA mandates strict access controls for protected health information. Exploitation could lead to non-compliance penalties.

Mitigation Strategies

Disable the samlWeb-2.0 feature in IBM WebSphere Application Server - Liberty if enabled. Apply the latest security patches from IBM to upgrade to a version beyond 26.0.0.10. Monitor IBM security advisories for updates.

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