Denial of Service Vulnerability in Oracle Helidon
CVE-2026-83330

7.5HIGH

Key Information:

Vendor

Oracle
Status
Helidon
Vendor
CVE Published:
15 September 2026

What is CVE-2026-83330?

A vulnerability in Oracle's Helidon component within the Fusion Middleware suite allows unauthenticated attackers with network access to exploit WebSocket functionality. This exploit can lead to a Denial of Service, causing the Helidon application to hang or crash repeatedly. The affected versions range from 4.0.0 to 4.5.4, and it poses a significant risk to availability, as successful attacks can disrupt service operations without the need for authentication.

Affected Version(s)

Helidon 4.0.0 <= 4.5.4

References

https://www.oracle.com/security-alerts/cspusep2026.html
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.