CVE-2026-91502
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Unauthenticated Remote Code Execution in Oracle WebLogic Server

Publication date: 2026-10-20

Last updated on: 2026-10-24

Assigner: Oracle

Description
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via TLS to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle WebLogic Server accessible data as well as unauthorized read access to a subset of Oracle WebLogic Server accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle WebLogic Server. CVSS 3.1 Base Score 7.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

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Meta Information

Published
2026-10-20
Last Modified
2026-10-24
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-91502
EUVD
EUVD-2026-106745

Affected Vendors & Products

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-306 The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

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Executive Summary

This is a vulnerability in Oracle WebLogic Server versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0. It allows an unauthenticated attacker with network access via TLS to compromise the server. Successful exploitation can lead to unauthorized data access, modification, or deletion, as well as partial denial of service.

Detection Guidance

Detecting this vulnerability requires checking for vulnerable versions of Oracle WebLogic Server. Use commands like 'java -jar wls_version.jar' or check server logs for version details. Network scans with tools like Nmap can identify WebLogic instances and their versions.

Impact Analysis

An attacker could gain unauthorized access to sensitive data stored in Oracle WebLogic Server, modify or delete data, or disrupt server operations. This could lead to data breaches, loss of data integrity, or service disruptions affecting business operations.

Compliance Impact

This vulnerability could lead to unauthorized access or disclosure of personal or sensitive data, violating GDPR and HIPAA requirements. Organizations using affected WebLogic Server versions may face compliance violations, legal penalties, and reputational damage.

Mitigation Strategies

Apply the latest Oracle WebLogic Server patches immediately. Restrict network access to the server via firewalls or network segmentation. Monitor for unusual activity and disable unnecessary services. Follow Oracle's security advisories for updates.

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