CVE-2026-93895: CWE-284 Improper Access Control in IBM WebSphere Application Server - Liberty
Description
CVE-2026-93895 is a critical vulnerability in IBM WebSphere Application Server - Liberty versions 20.0.0.12 through 26.0.0.10. It allows an unauthenticated remote attacker to bypass access controls configured on gRPC service methods, potentially leading to unauthorized access to sensitive data or functionality.
CVSS v3.1
Score 9.1critical
Affected software
IBM
WebSphere Application Server - Liberty
pkg:rpm/ibm/websphere_application_server_libertycpe:2.3:a:ibm:websphere_application_server_liberty:20.0.0.12:*:*:*:*:*:*:*cpe:2.3:a:ibm:websphere_application_server_liberty:26.0.0.10:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-284 Improper Access Control) affects IBM WebSphere Application Server - Liberty versions from 20.0.0.12 up to and including 26.0.0.10. An unauthenticated remote attacker could exploit this flaw to bypass access controls on gRPC service methods, which are used for remote procedure calls. The CVSS 3.1 score is 9.1, indicating a critical severity with network attack vector, no privileges required, no user interaction, and high impact on confidentiality and integrity but no impact on availability.
Potential Impact
Successful exploitation could allow attackers to access or manipulate gRPC service methods without authentication, compromising confidentiality and integrity of the affected system. This could lead to unauthorized data disclosure or modification. There are no known exploits in the wild at this time.
Mitigation Recommendations
No explicit patch or remediation details are provided in the input data. Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until a fix is available, restrict network access to affected services and monitor for unusual activity related to gRPC service methods.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-09-18T20:30:18.225Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ace95e32cdf04f656aad86b
Added to database: 10/13/2026, 20:34:43 UTC
Last enriched: 10/13/2026, 20:48:28 UTC
Last updated: 10/13/2026, 20:50:23 UTC
Views: 4
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