CVE-2026-91259: High severity Oracle Oracle Identity Manager vulnerability

Published Oct 20, 2026

Updated

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).

Affected Software

3 affected components

Oracle Oracle Identity Manager=12.2.1.4.0, =14.1.2.1.0

Oracle Identity Manager=12.2.1.4.0

Oracle Identity Manager=14.1.2.1.0

Event History

Oct 20, 2026

CVE Published

via MITRE·09:24 PM

Data Sourced

via MITRE·09:24 PM

DescriptionSeverity

Data Sourced

via NVD·10:20 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

Which deployments are affected?

Affected supported versions are Oracle Identity Manager 12.2.1.4.0 and 14.1.2.1.0, specifically the OIM Legacy UI component.

What access does an attacker need to exploit this issue?

An attacker needs network access to the Oracle Identity Manager service via HTTP and a low-privileged account. No user interaction is required, and exploitation is described as easy.

What is the potential impact of successful exploitation?

Successful exploitation can lead to takeover of Oracle Identity Manager, with high impacts to confidentiality, integrity, and availability.