CVE-2026-87251
Analyzed Analyzed - Analysis Complete

Authentication Bypass in Oracle Access Manager

Publication date: 2026-10-20

Last updated on: 2026-11-04

Assigner: Oracle

Description
Vulnerability in the Oracle Access Manager product of Oracle Fusion Middleware (component: Authentication Engine). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.1.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via SAML to compromise Oracle Access Manager. Successful attacks of this vulnerability can result in takeover of Oracle Access Manager. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS Scores

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Meta Information

Published
2026-10-20
Last Modified
2026-11-04
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-87251
EUVD
EUVD-2026-106328

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
oracle access_manager 12.2.1.4.0
oracle access_manager 14.1.2.1.0

Helpful Resources

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.
CWE-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Attack-Flow Graph

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Executive Summary

This is a vulnerability in Oracle Access Manager, a product under Oracle Fusion Middleware. It affects versions 12.2.1.4.0 and 14.1.2.1.0. The issue allows an unauthenticated attacker with network access via SAML to compromise the system. Successful exploitation can lead to a complete takeover of Oracle Access Manager.

Detection Guidance

This vulnerability is specific to Oracle Access Manager and requires network-level detection. Monitor for unusual SAML authentication attempts or unauthorized access to the Oracle Access Manager component. Check logs for unexpected SAML requests or administrative actions. Ensure Oracle Access Manager is updated to the latest patched version.

Impact Analysis

An attacker could exploit this to gain full control over Oracle Access Manager, potentially leading to unauthorized access to sensitive data, disruption of services, or further attacks within the network. The high CVSS score indicates significant risk.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate compliance requirements under GDPR, HIPAA, or other regulations. Organizations using affected versions must address this to maintain compliance.

Mitigation Strategies

Apply the latest Oracle Access Manager patches or updates as soon as possible to address the vulnerability in the Authentication Engine component.

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