# CVE-2026-91419: Oracle HTTP Server privilege escalation in OSSL Module

Source: https://junglewise.ai/threats/cve-2026-91419-vulnerability-in-the-oracle-http-server-product-of-oracle-fusion  
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-2026-91419 · Severity: high · CVSS 7.8 · Published 2026-10-20

Oracle HTTP Server is a web server component of Oracle Fusion Middleware that handles HTTP traffic for enterprise applications. A local privilege escalation flaw in its OSSL Module allows a low-privileged user with system access to gain complete control of the server, potentially compromising confidentiality, integrity, and availability of hosted applications and data.

Technologies: [Oracle Http Server](https://junglewise.ai/threats/technologies/oracle-http-server). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-91419 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91419 being exploited in the wild.

**How severe is CVE-2026-91419?** High severity, with a CVSS score of 7.8, published 20 October 2026.

**Which products and versions are affected?** Oracle Http Server 12.2.1.4.0.

**Is there a fix for CVE-2026-91419?** 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-2026-91419 attacked?** It is attacked with local access, in a web application.

**Am I affected by CVE-2026-91419?** Check whether you run Oracle Http Server 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 OSSL Module component of Oracle HTTP Server 12.2.1.4.0. The vulnerability is easily exploitable by a low-privileged attacker with local logon access to the infrastructure, requiring no user interaction. Successful exploitation results in full server compromise with high impact to confidentiality, integrity, and availability.

## Affected products

- Oracle HTTP Server 12.2.1.4.0

## 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 HTTP Server privilege escalation in Web Listener](https://junglewise.ai/threats/cve-2026-91473-vulnerability-in-the-oracle-http-server-product-of-oracle-fusion)
- [Oracle HTTP Server data access vulnerability in OSSL Module](https://junglewise.ai/threats/cve-2026-87347-vulnerability-in-the-oracle-http-server-product-of-oracle-fusion)
- [Oracle HTTP Server unauthorized data access in Weblogic Proxy Plug-in](https://junglewise.ai/threats/cve-2026-87346-vulnerability-in-the-oracle-http-server-product-of-oracle-fusion)
- [Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.](https://junglewise.ai/threats/cve-2026-34291-vulnerability-in-the-oracle-http-server-product-of-oracle-fusion)