CVE-2026-83458: Medium severity Oracle Helidon vulnerability
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: JSON). 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 Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Compensating control
Mitigate partial denial of service by restricting network access to Helidon over HTTP (e.g., limit inbound HTTP traffic to trusted sources).
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An unauthenticated attacker with network access to the Helidon HTTP service can exploit it. No user interaction or prior privileges are required.
Which deployments are affected?
Affected supported versions are Helidon 4.0.0 through 4.5.4. The issue is in the JSON component.
What is the impact of a successful attack?
A successful attack can cause a partial denial of service affecting Helidon availability. The provided CVSS vector indicates no confidentiality or integrity impact.