Exploitable OIM Legacy UI bug in Oracle I.M. 12.2.1.4.0 & 14.1.2.1.0
CVE-2026-91259 Published on October 20, 2026
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).
Vulnerability Analysis
CVE-2026-91259 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is an authentification Vulnerability?
When an actor claims to have a given identity, the software does not prove or insufficiently proves that the claim is correct.
CVE-2026-91259 has been classified to as an authentification vulnerability or weakness.
Products Associated with CVE-2026-91259
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Affected Versions
Oracle Corporation Oracle Identity Manager:- Version 12.2.1.4.0 is affected.
- Version 14.1.2.1.0 is affected.