Live › vulnerability › CVE-2026-91663
Go to dashboardOracle Essbase 21.8.3.0.0 has a flaw in the Security component reachable over T3 and IIOP. An attacker with low-privilege credentials can take over Essbase, and the changed scope can affect other products. CVSS 9.9. Fixed in the October 2026 Critical Patch Update; the patch details are in the My Oracle Support patch availability document for Database.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| oracle essbase | vendor | = 21.8.3.0.0 | – |
| essbase | vendor | 21.8.3.0.0 | – |
21.8.3.0.0 and whether its T3/IIOP ports are reachable from untrusted networksDatabase patch availability document (login required)Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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 T3, IIOP 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).
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