Oracle Essbase 21.8.3.0.0 Security privileges management

Summaryinfo

A vulnerability, which was classified as very critical, was found in Oracle Essbase 21.8.3.0.0. This affects an unknown part of the component Security. Executing a manipulation can lead to privileges management. This vulnerability is handled as CVE-2026-91637. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Oracle Essbase 21.8.3.0.0 and classified as very critical. This vulnerability affects some unknown functionality of the component Security. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Vulnerability in Oracle Essbase (component: Security). The supported version that is affected is 21.8.3.0.0. Easily exploitable 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 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).

The advisory is available at oracle.com. This vulnerability was named CVE-2026-91637 since 09/15/2026. The exploitation appears to be easy. The attack can be initiated 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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