CVE-2026-91240
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Oracle WebCenter Sites Unauthorized Data Access Vulnerability

Publication date: 2026-10-20

Last updated on: 2026-10-28

Assigner: Oracle

Description
Vulnerability in the Oracle WebCenter Sites product of Oracle Fusion Middleware (component: WebCenter Sites). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebCenter Sites. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle WebCenter Sites accessible data. CVSS 3.1 Base Score 5.9 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).

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Meta Information

Published
2026-10-20
Last Modified
2026-10-28
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-91240
EUVD
EUVD-2026-106495

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
Oracle Corporation Oracle WebCenter Sites 12.2.1.4.0
Oracle Corporation Oracle WebCenter Sites 14.1.2.0.0

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

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Executive Summary

This is a vulnerability in Oracle WebCenter Sites, a product under Oracle Fusion Middleware. It affects versions 12.2.1.4.0 and 14.1.2.0.0. The issue allows an unauthenticated attacker to remotely access the system via HTTP and potentially gain unauthorized access to sensitive data or take full control of the system.

Detection Guidance

Detection requires checking for Oracle WebCenter Sites versions 12.2.1.4.0 or 14.1.2.0.0. Verify if the system is running these versions and inspect HTTP traffic for unusual access patterns or unauthorized data requests.

Impact Analysis

If you use Oracle WebCenter Sites versions 12.2.1.4.0 or 14.1.2.0.0, an attacker could exploit this flaw to steal critical data or gain full access to your system. This could lead to data breaches, unauthorized modifications, or service disruption.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate GDPR, HIPAA, or other regulations requiring data protection. Organizations using affected versions may face compliance violations, legal penalties, and reputational damage.

Mitigation Strategies

Apply the latest security patches from Oracle for Oracle WebCenter Sites versions 12.2.1.4.0 and 14.1.2.0.0. Restrict network access to HTTP ports used by Oracle WebCenter Sites. Monitor for unauthorized access attempts or unusual data access patterns.

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