---
title: "CVE-2026-91642: Oracle Essbase - Broken Access Control"
description: "Oracle Essbase 21.8.3.0.0 contains a broken access control vulnerability in Security component, letting unauthenticated attackers with network access via HTTP perform unauthorized data read, modification, and partial denial of service."
url: https://panop.io/threat-heartbeat/CVE-2026-91642/
---

# CVE-2026-91642 Oracle Essbase - Broken Access Control

Oracle Essbase 21.8.3.0.0 contains a broken access control vulnerability in Security component, letting unauthenticated attackers with network access via HTTP perform unauthorized data read, modification, and partial denial of service.

CVSS base score 7.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-91642)

## Details

Type

Broken Access Control

Impact

Information Disclosure, Data Tampering, Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Published

20 October 2026

Updated

21 October 2026

## Vendor fix

Update to the latest available version beyond 21.8.3.0.0.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-91642](https://nvd.nist.gov/vuln/detail/CVE-2026-91642)
- [https://www.oracle.com/security-alerts/cpuoct2026.html](https://www.oracle.com/security-alerts/cpuoct2026.html)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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