Oracle Essbase 21.8.3.0.0 Security privileges management

Summaryinfo

A vulnerability categorized as very critical has been discovered in Oracle Essbase 21.8.3.0.0. Affected by this vulnerability is an unknown functionality of the component Security. The manipulation results in privileges management. This vulnerability is identified as CVE-2026-91635. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Oracle Essbase 21.8.3.0.0. It has been classified as very critical. Affected is an unknown functionality of the component Security. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Vulnerability in Oracle Essbase (component: Security). The supported version that is affected is 21.8.3.0.0. Difficult to exploit vulnerability allows unauthenticated attacker with network access via T3, IIOP to compromise Oracle Essbase. Successful attacks of this vulnerability can result in takeover of Oracle Essbase. CVSS 3.1 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).

The advisory is available at oracle.com. This vulnerability is traded as CVE-2026-91635 since 09/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 10/21/2026). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• Oracle

Name

• Essbase

Version

• 21.8.3.0.0

License

• commercial

Website

• Vendor: https://www.oracle.com

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