CVE-2026-73934: High severity Oracle Helidon vulnerability
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 3.0.0-3.2.18. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Affected Software
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Oracle Helidon deployments using the Imperative Web Server component in supported version 3.2.19 are affected when they are reachable over HTTP/2. The issue can be exploited remotely over the network.
Does exploitation require authentication or user interaction?
No. An unauthenticated attacker can exploit the issue, and no user interaction is required.
What is the expected impact of a successful attack?
Successful exploitation can cause Helidon to hang or crash repeatedly, resulting in a complete denial of service. The provided CVSS vector identifies availability as the affected security property, with no stated confidentiality or integrity impact.