---
id: "CVE-2026-91630"
kind: "vulnerability"
aliases: ["CVE-2026-91630"]
title: "Oracle Essbase: Security component flaw exposes critical data to privileged attackers"
severity: "medium"
cvss: 6.8
epss: 0.00302
exploited: false
status: "open"
category: "vendor"
products: [{"name": "oracle essbase", "fixed": [], "affected": "= 21.8.3.0.0", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["oracle-essbase", "self-hosted", "vendor"]
not_affected_if: ["no-http-exposure", "other-versions"]
published_at: "2026-10-20T22:21:02+00:00"
first_seen_at: "2026-10-23T21:57:27+00:00"
updated_at: "2026-10-25T03:43:01+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91630", "first_seen_at": "2026-10-23T21:57:27+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91630", "first_seen_at": "2026-10-24T13:15:55+00:00"}]
---

# Oracle Essbase: Security component flaw exposes critical data to privileged attackers

Oracle Essbase 21.8.3.0.0 has a flaw in its Security component that can be reached over HTTP. An attacker who already holds high-privilege credentials can read critical data and reach other products connected to Essbase.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:oracle essbase affected = 21.8.3.0.0 fixed ?

## How to check

- Confirm whether the installed Essbase release is `21.8.3.0.0` by checking the server version in the Essbase administration console or install metadata
- unknown for any other check, since the sources do not describe specific configuration

## Fix

- Apply the Oracle Critical Patch Update fix for Essbase; the fixed version is unknown from the sources
- Review high-privilege accounts on Essbase and remove any that are not needed

## Timeline

- 2026-10-23T21:57:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91630
- 2026-10-24T13:15:55+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91630

## From the sources

Vulnerability in Oracle Essbase (component: Security).   The supported version that is affected is 21.8.3.0.0. Easily exploitable vulnerability allows high 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  unauthorized access to critical data or complete access to all Oracle Essbase accessible data. CVSS 3.1 Base Score 6.8 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N).

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_