CVE-2026-83426

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. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Access Manager. While the vulnerability is in Oracle Access Manager, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Access Manager accessible data as well as unauthorized access to critical data or complete access to all Oracle Access Manager accessible data. CVSS 3.1 Base Score 8.7 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N).

CVSS Scores

EPSS 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-2026-83426

EUVD

EUVD-2026-106326

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	access_manager	12.2.1.4.0
oracle	access_manager	14.1.2.1.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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

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 HTTP to compromise the system. The vulnerability has a CVSS base score of 8.7, indicating high impact on confidentiality and integrity.

Impact Analysis

An attacker could exploit this to create, delete, or modify critical data in Oracle Access Manager. They could also gain unauthorized access to sensitive data. The attack is difficult but possible over a network without authentication.

Compliance Impact

This vulnerability allows unauthorized access to critical data or modification of data in Oracle Access Manager, which could lead to unauthorized disclosure or alteration of sensitive information. This may violate compliance requirements under GDPR (data protection and privacy) and HIPAA (protected health information security).

Mitigation Strategies

Apply the latest Oracle Access Manager patches immediately as they become available. Restrict network access to Oracle Access Manager ports via firewalls. Monitor HTTP traffic for unusual patterns targeting the Authentication Engine component.

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EPSS Chart

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