# CVE-2026-91648: Oracle Essbase unauthenticated information disclosure in Java Based Agent

Source: https://junglewise.ai/threats/cve-2026-91648-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-2026-91648 · Severity: medium · CVSS 5.3 · Published 2026-10-20

Oracle Essbase is a financial and business analytics platform used to consolidate and analyze corporate data. An unauthenticated attacker on the network can exploit this vulnerability to read sensitive data from Essbase without requiring credentials, potentially exposing financial reports and analytical datasets.

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

## Quick answers

**Is CVE-2026-91648 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91648 being exploited in the wild.

**How severe is CVE-2026-91648?** Medium severity, with a CVSS score of 5.3, published 20 October 2026.

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

**Is there a fix for CVE-2026-91648?** 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-2026-91648 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-91648?** 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

An easily exploitable unauthenticated vulnerability exists in the Java Based Agent component of Oracle Essbase, allowing network attackers to read a subset of accessible data without authentication. The vulnerability is triggered via TCP network access and requires no user interaction. A successful exploit results in confidentiality impact only, with no integrity or availability impact.

## 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)