# CVE-2026-83426: Oracle Access Manager authentication bypass in HTTP

Source: https://junglewise.ai/threats/cve-2026-83426-vulnerability-in-the-oracle-access-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-2026-83426 · Severity: high · CVSS 8.7 · Published 2026-10-20

Oracle Access Manager is an authentication and authorization platform that protects access to enterprise applications. An unauthenticated attacker can exploit a difficult-to-exploit flaw in the Authentication Engine via HTTP to bypass authentication, potentially reading, modifying, or deleting sensitive data across the system and potentially affecting other connected products.

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

## Quick answers

**Is CVE-2026-83426 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-83426 being exploited in the wild.

**How severe is CVE-2026-83426?** High severity, with a CVSS score of 8.7, published 20 October 2026.

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

**Is there a fix for CVE-2026-83426?** 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-2026-83426 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-83426?** Check whether you run Oracle Access 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 exists in the Oracle Access Manager Authentication Engine component that allows an unauthenticated attacker with network access via HTTP to compromise the system despite high attack complexity requirements. Successful exploitation results in unauthorized access to critical data and the ability to create, modify, or delete Access Manager data, with potential scope expansion to other Oracle Fusion Middleware components.

## Affected products

- Oracle Access 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 Access Manager authentication bypass in HTTP](https://junglewise.ai/threats/cve-2026-87337-vulnerability-in-the-oracle-access-manager-product-of-oracle)
- [Oracle Access Manager authentication bypass via HTTP](https://junglewise.ai/threats/cve-2026-87296-vulnerability-in-the-oracle-access-manager-product-of-oracle)
- [Oracle Access Manager authentication bypass in SAML](https://junglewise.ai/threats/cve-2026-87251-vulnerability-in-the-oracle-access-manager-product-of-oracle)
- [Oracle Access Manager SAML authentication bypass](https://junglewise.ai/threats/cve-2026-83409-vulnerability-in-the-oracle-access-manager-product-of-oracle)
- [Oracle Access Manager authentication bypass via HTTP](https://junglewise.ai/threats/cve-2026-83407-vulnerability-in-the-oracle-access-manager-product-of-oracle)