# CVE-2026-83480

## Summary

- **CVE ID:** CVE-2026-83480
- **Severity:** MEDIUM
- **CVSS Score:** 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
- **CWE:** N/A
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: WebSocket).  Supported versions that are affected are 4.0.0-4.5.4. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon.  Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 5.3 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

## Affected Products

- Oracle Corporation — Helidon (4.0.0)

## References

- [CNA](https://www.oracle.com/security-alerts/cspusep2026.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.31%
- **EPSS Percentile:** 23.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._