Denial of Service Vulnerability in Helidon of Oracle Fusion Middleware
CVE-2026-83276

7.5HIGH

Key Information:

Vendor

Oracle
Status
Helidon
Vendor
CVE Published:
15 September 2026

What is CVE-2026-83276?

A vulnerability in Oracle's Helidon, part of the Fusion Middleware suite, allows unauthenticated attackers with network access via HTTP/2 to exploit the service. The flaw can lead to a denial of service, resulting in the Helidon server hanging or crashing repeatedly. This could severely disrupt operations for users relying on the affected versions from 4.0.0 to 4.5.4. Immediate remediation is recommended to prevent potential uptime loss.

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

.