Oracle Essbase 21.8.3.0.0 Essbase Web Platform privileges management

Summaryinfo

A vulnerability was found in Oracle Essbase 21.8.3.0.0. It has been declared as very critical. Affected by this issue is some unknown functionality of the component Essbase Web Platform. The manipulation results in privileges management. This vulnerability was named CVE-2026-91651. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in Oracle Essbase 21.8.3.0.0. Affected is some unknown processing of the component Essbase Web Platform. 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: Essbase Web Platform). The supported version that is affected is 21.8.3.0.0. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Essbase. While the vulnerability is in Oracle Essbase, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle Essbase. CVSS 3.1 Base Score 8.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H).

The advisory is available at oracle.com. This vulnerability is traded as CVE-2026-91651 since 09/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. 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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