# CVE-2026-91653: Oracle Essbase privilege escalation in Web Platform

Source: https://junglewise.ai/threats/cve-2026-91653-vulnerability-in-oracle-essbase-component-essbase-web-platform  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-20. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-91653 · Severity: high · CVSS 8.5 · Published 2026-10-20

Oracle Essbase is a financial planning and analytics platform used by enterprises to manage and consolidate business data. A vulnerability in the Essbase Web Platform allows a low-privileged network attacker to gain unauthorized access to sensitive financial data and modify critical information. Successful exploitation could expose or compromise confidential business data and impact other connected systems.

Technologies: [Oracle Essbase](https://junglewise.ai/threats/technologies/essbase). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-91653 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91653 being exploited in the wild.

**How severe is CVE-2026-91653?** High severity, with a CVSS score of 8.5, published 20 October 2026.

**Which products and versions are affected?** Oracle Essbase 21.8.3.0.0.

**Is there a fix for CVE-2026-91653?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-91653 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-91653?** Check whether you run Oracle Essbase at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is a scope-change vulnerability in Oracle Essbase's Web Platform component affecting version 21.8.3.0.0. The vulnerability is easily exploitable via HTTP by an authenticated network attacker with low privileges (PR:L), allowing them to escalate access to critical data and make unauthorized modifications (C:H, I:L impacts). A fix status has not been confirmed in the available advisory information.

## Affected products

- Oracle Essbase 21.8.3.0.0

## Timeline

- 2026-10-20: disclosed

## References

- [https://www.oracle.com/security-alerts/cpuoct2026.html](https://www.oracle.com/security-alerts/cpuoct2026.html)

## Related threats

- [Oracle Essbase unauthenticated remote code execution](https://junglewise.ai/threats/cve-2026-91665-vulnerability-in-oracle-essbase-component-security-the-supported)
- [Oracle Essbase denial of service in Security component](https://junglewise.ai/threats/cve-2026-91664-vulnerability-in-oracle-essbase-component-security-the-supported)
- [Oracle Essbase privilege escalation in Security component](https://junglewise.ai/threats/cve-2026-91663-vulnerability-in-oracle-essbase-component-security-the-supported)
- [Oracle Essbase privilege escalation in Java Based Agent](https://junglewise.ai/threats/cve-2026-91662-vulnerability-in-oracle-essbase-component-java-based-agent-the)
- [Oracle Essbase authentication bypass in security component](https://junglewise.ai/threats/cve-2026-91661-vulnerability-in-oracle-essbase-component-security-the-supported)