# CVE-2026-91458: Oracle Outside In Technology privilege escalation in Outside In Core

Source: https://junglewise.ai/threats/cve-2026-91458-vulnerability-in-the-oracle-outside-in-technology-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-2026-91458 · Severity: high · CVSS 7.8 · Published 2026-10-20

Oracle Outside In Technology is a document conversion and viewing component used in Oracle Fusion Middleware to process various file formats. A privilege escalation vulnerability in the Outside In Core component allows a local attacker to take full control of the affected system when a user opens a malicious file, compromising all data and services running on that infrastructure.

Technologies: [Oracle Outside In Technology](https://junglewise.ai/threats/technologies/outside-in-technology). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-91458 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91458 being exploited in the wild.

**How severe is CVE-2026-91458?** High severity, with a CVSS score of 7.8, published 20 October 2026.

**Which products and versions are affected?** Oracle Outside In Technology 8.5.8.

**Is there a fix for CVE-2026-91458?** 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-2026-91458 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-91458?** Check whether you run Oracle Outside In Technology 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 local privilege escalation vulnerability in Oracle Outside In Technology (version 8.5.8) that requires user interaction—specifically, a user must open a crafted file to trigger the flaw. An unauthenticated local attacker can exploit this to achieve complete system compromise with high confidentiality, integrity, and availability impact. The attack vector is local and does not require authentication credentials.

## Affected products

- Oracle Outside In Technology 8.5.8

## 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 Outside In Technology privilege escalation in Core](https://junglewise.ai/threats/cve-2026-91483-vulnerability-in-the-oracle-outside-in-technology-product-of)
- [Oracle Outside In Technology privilege escalation in Clean Content SDK](https://junglewise.ai/threats/cve-2026-91475-vulnerability-in-the-oracle-outside-in-technology-product-of)
- [Oracle Outside In Technology privilege escalation in Image Export SDK](https://junglewise.ai/threats/cve-2026-91460-vulnerability-in-the-oracle-outside-in-technology-product-of)
- [Oracle Outside In Technology code execution in Image Export SDK](https://junglewise.ai/threats/cve-2026-91459-vulnerability-in-the-oracle-outside-in-technology-product-of)
- [Oracle Outside In Technology code execution in Image Export SDK](https://junglewise.ai/threats/cve-2026-91457-vulnerability-in-the-oracle-outside-in-technology-product-of)