# CVE-2026-91259: Oracle Identity Manager privilege escalation in Legacy UI

Source: https://junglewise.ai/threats/cve-2026-91259-vulnerability-in-the-oracle-identity-manager-product-of-oracle  
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-2026-91259 · Severity: high · CVSS 8.8 · Published 2026-10-20

Oracle Identity Manager is a critical component of Oracle Fusion Middleware that manages user identities and access controls across enterprise systems. A low-privileged attacker with network access can exploit this vulnerability to gain complete control over the Identity Manager, potentially compromising all user accounts and access policies in the organization. This vulnerability requires only network access and allows an authenticated attacker to escalate privileges and take over the entire system.

Technologies: [Oracle Identity Manager](https://junglewise.ai/threats/technologies/oracle-identity-manager). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-91259 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91259 being exploited in the wild.

**How severe is CVE-2026-91259?** High severity, with a CVSS score of 8.8, published 20 October 2026.

**Which products and versions are affected?** Oracle Identity Manager 12.2.1.4.0, 14.1.2.1.0.

**Is there a fix for CVE-2026-91259?** 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-2026-91259 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-91259?** Check whether you run Oracle Identity 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

The vulnerability exists in the OIM Legacy UI component and is easily exploitable by a low-privileged attacker with network access via HTTP. An authenticated attacker can exploit this flaw to achieve complete compromise of Oracle Identity Manager with high impact on confidentiality, integrity, and availability. The attack requires no user interaction and no special configuration.

## Affected products

- Oracle Identity Manager 12.2.1.4.0, 14.1.2.1.0

## 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 Identity Manager privilege escalation in Installer](https://junglewise.ai/threats/cve-2026-91501-vulnerability-in-the-oracle-identity-manager-product-of-oracle)
- [Oracle Identity Manager unauthenticated remote code execution](https://junglewise.ai/threats/cve-2026-91408-vulnerability-in-the-oracle-identity-manager-product-of-oracle)
- [Oracle Identity Manager remote code execution in REST WebServices](https://junglewise.ai/threats/cve-2026-91407-vulnerability-in-the-oracle-identity-manager-product-of-oracle)
- [Oracle Identity Manager arbitrary code execution in OIM Legacy UI](https://junglewise.ai/threats/cve-2026-83403-vulnerability-in-the-oracle-identity-manager-product-of-oracle)
- [Oracle Identity Manager privilege escalation in OIM Legacy UI](https://junglewise.ai/threats/cve-2026-83402-vulnerability-in-the-oracle-identity-manager-product-of-oracle)