# CVE-2026-83390: Oracle E-Business Suite Applications Manager information disclosure and denial of service in Diagnostics

Source: https://junglewise.ai/threats/cve-2026-83390-vulnerability-in-the-oracle-applications-manager-product-of  
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-2026-83390 · Severity: medium · CVSS 4.2 · Published 2026-10-20

Oracle Applications Manager is a monitoring and diagnostic tool for Oracle E-Business Suite, Oracle's enterprise resource planning system. A vulnerability in its Diagnostics component allows a low-privileged network attacker to read sensitive application data and temporarily disrupt service availability. This could expose business-critical information and impact operations.

Technologies: [Oracle E-Business Suite Applications Manager](https://junglewise.ai/threats/technologies/e-business-suite-applications-manager). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-83390 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-83390 being exploited in the wild.

**How severe is CVE-2026-83390?** Medium severity, with a CVSS score of 4.2, published 20 October 2026.

**Which products and versions are affected?** Oracle E-Business Suite Applications Manager 12.2.3 to 12.2.15.

**Is there a fix for CVE-2026-83390?** 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-2026-83390 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-83390?** Check whether you run Oracle E-Business Suite Applications Manager 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 difficult-to-exploit vulnerability in Oracle Applications Manager's Diagnostics component allows a low-privileged attacker with network access via HTTP to achieve information disclosure and denial of service. The vulnerability requires high attack complexity and affects versions 12.2.3 through 12.2.15. Successful exploitation results in partial confidentiality and availability impact.

## Affected products

- Oracle E-Business Suite Applications Manager 12.2.3 to 12.2.15

## 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 Applications Manager privilege escalation in E-Business Suite](https://junglewise.ai/threats/cve-2026-91532-vulnerability-in-the-oracle-applications-manager-product-of)
- [Oracle Applications Manager authentication bypass in RapidClone](https://junglewise.ai/threats/cve-2026-83341-oracle-applications-manager-authentication-bypass-in-rapidclone)
- [Oracle E-Business Suite Applications Manager authentication bypass](https://junglewise.ai/threats/cve-2026-83338-oracle-e-business-suite-applications-manager-authentication)
- [Oracle Applications Manager privilege escalation in Oracle Diagnostics Interfaces](https://junglewise.ai/threats/cve-2026-83168-oracle-applications-manager-privilege-escalation-in-oracle)