CVE-2026-73894: High 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 4.0.0-4.4.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Helidon accessible data as well as unauthorized read access to a subset of Helidon accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 7.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Oracle Fusion Middleware (Helidon) - Imperative Web Serverto a version that resolves this vulnerability.Fixed in 4.4.1 - Compensating control
Because the vulnerability is reachable via HTTP with network access (AV:N) and is exploitable without authentication (PR:N), restrict inbound HTTP access to the Helidon Imperative Web Server to only trusted networks/hosts (e.g., via firewall/ACL), to reduce exposure to unauthenticated network attackers.
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An unauthenticated attacker with network access to the affected Helidon Imperative Web Server over HTTP can exploit it. No privileges or user interaction are required.
Which deployments are known to be affected?
The affected supported version identified is Oracle Helidon Imperative Web Server 4.5.0. The provided information does not identify other affected versions or configuration-specific requirements.
What could a successful attacker do?
A successful attack can allow unauthorized reading of a subset of Helidon-accessible data and unauthorized update, insertion, or deletion of some accessible data. It can also cause a partial denial of service.