CVE-2026-91259
Analyzed Analyzed - Analysis Complete

Oracle Identity Manager Legacy UI Authentication Bypass

Publication date: 2026-10-20

Last updated on: 2026-11-03

Assigner: Oracle

Description
Vulnerability in the Oracle Identity Manager product of Oracle Fusion Middleware (component: OIM Legacy UI). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.1.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Identity Manager. Successful attacks of this vulnerability can result in takeover of Oracle Identity Manager. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

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Meta Information

Published
2026-10-20
Last Modified
2026-11-03
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-91259
EUVD
EUVD-2026-106513

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE
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KEV
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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.

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Executive Summary

This is a vulnerability in Oracle Identity Manager, specifically in the OIM Legacy UI component. It affects versions 12.2.1.4.0 and 14.1.2.1.0. The issue allows a low-privileged attacker with network access via HTTP to compromise the system and potentially take over Oracle Identity Manager.

Detection Guidance

This vulnerability affects Oracle Identity Manager versions 12.2.1.4.0 and 14.1.2.1.0. Detection involves checking for vulnerable versions of Oracle Identity Manager running on your systems. Inspect installed software versions using Oracle's tools or package managers. Verify if the OIM Legacy UI component is exposed to HTTP network access.

Impact Analysis

An attacker could exploit this to gain full control of Oracle Identity Manager, leading to unauthorized access, data breaches, or system manipulation. This could result in loss of confidentiality, integrity, and availability of critical identity management functions.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate compliance requirements such as GDPR (data protection) or HIPAA (health information privacy). Organizations using affected versions must address this to maintain regulatory compliance.

Mitigation Strategies

Apply the latest Oracle Identity Manager patches or updates for versions 12.2.1.4.0 and 14.1.2.1.0 to address the vulnerability. Restrict network access to Oracle Identity Manager via HTTP to trusted sources only. Review and enforce strict access controls for low-privileged users.

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