CVE-2026-73900: Medium severity Oracle Helidon (Imperative Web Server) vulnerability
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.5.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Oracle Fusion Middleware - Helidon (Imperative Web Server)to a version that resolves this vulnerability.Fixed in 4.0.0-4.5.0
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Oracle Helidon deployments using the Imperative Web Server component in supported version 4.5.1 are identified as affected. The attack path is available over HTTP to an attacker with network access.
Does exploitation require authentication or user interaction?
No. The vulnerability is described as easily exploitable by an unauthenticated attacker, and it requires neither privileges nor user interaction.
What is the expected impact if exploitation succeeds?
A successful attack can provide unauthorized read access to a subset of data accessible through Helidon. The stated impact is limited to confidentiality; no integrity or availability impact is identified.