CVE-2026-93909: CWE-384 Session Fixation in IBM WebSphere Application Server - Liberty
Description
IBM WebSphere Application Server - Liberty versions 17.0.0.3 through 26.0.0.10 contain a critical authentication bypass vulnerability related to session fixation when the samlWeb-2.0 feature is enabled. This vulnerability allows an attacker to bypass authentication, potentially leading to full compromise of confidentiality and integrity without requiring user interaction.
CVSS v3.1
Score 9.1critical
Affected software
IBM
WebSphere Application Server - Liberty
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:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-93909 is a critical authentication bypass vulnerability in IBM WebSphere Application Server - Liberty affecting versions 17.0.0.3 through 26.0.0.10. The issue arises when the samlWeb-2.0 feature is enabled, enabling session fixation attacks that allow an attacker to bypass authentication controls. The vulnerability is classified under CWE-384 (Session Fixation). The CVSS v3.1 base score is 9.1, indicating high severity with network attack vector, low attack complexity, no privileges or user interaction required, and impacts confidentiality and integrity.
Potential Impact
Successful exploitation of this vulnerability allows an unauthenticated attacker to bypass authentication mechanisms, resulting in full compromise of confidentiality and integrity of the affected system. Availability is not impacted. This could lead to unauthorized access to sensitive data and system functions.
Mitigation Recommendations
No patch or official fix information is currently provided. Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until a fix is available, consider disabling the samlWeb-2.0 feature if feasible or applying any recommended workarounds from IBM.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-09-18T20:50:11.214Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ace95e32cdf04f656aad86d
Added to database: 10/13/2026, 20:34:43 UTC
Last enriched: 10/13/2026, 20:48:20 UTC
Last updated: 10/13/2026, 20:50:23 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.