CVE-2026-83459: Medium severity Oracle Helidon vulnerability
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-media-multipart). Supported versions that are affected are 3.0.0-3.2.20. 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
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Oracle Helidon deployments using the helidon-media-multipart component in supported versions 3.0.0 through 3.2.20 are affected. The vulnerable interface is reachable over HTTP.
Does exploitation require authentication or user interaction?
No. An unauthenticated attacker with network access can exploit the issue, and no user interaction is required.
What is the expected impact of a successful attack?
Successful exploitation can cause a partial denial of service affecting Helidon availability. The stated CVSS impact is limited to availability; confidentiality and integrity impacts are listed as none.