# CVE-2026-91662: Oracle Essbase privilege escalation in Java Based Agent

Source: https://junglewise.ai/threats/cve-2026-91662-vulnerability-in-oracle-essbase-component-java-based-agent-the  
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-2026-91662 · Severity: medium · CVSS 6.4 · Published 2026-10-20

Oracle Essbase is an analytics and planning application that manages business data. A local privilege escalation vulnerability in its Java-based agent component allows an authenticated user with local infrastructure access to gain unauthorized read and write access to sensitive analytics data. The vulnerability has a moderate impact on data confidentiality and integrity.

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

## Quick answers

**Is CVE-2026-91662 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91662 being exploited in the wild.

**How severe is CVE-2026-91662?** Medium severity, with a CVSS score of 6.4, published 20 October 2026.

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

**Is there a fix for CVE-2026-91662?** 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-2026-91662 attacked?** It is attacked with local access, in a hosted service.

**Am I affected by CVE-2026-91662?** 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

A privilege escalation vulnerability exists in the Java Based Agent component of Oracle Essbase affecting version 21.8.3.0.0. The vulnerability requires local access and valid credentials; a low-privileged attacker on the infrastructure hosting Essbase can exploit it to gain higher privileges and read or modify critical data. The scope is marked as changed, indicating impact beyond the vulnerable component itself.

## 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 authentication bypass in security component](https://junglewise.ai/threats/cve-2026-91661-vulnerability-in-oracle-essbase-component-security-the-supported)
- [Oracle Essbase denial of service in Security component](https://junglewise.ai/threats/cve-2026-91660-vulnerability-in-oracle-essbase-component-security-the-supported)