CVE-2026-71167: Critical severity Oracle Oracle Fusion Middleware 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 creation, deletion or modification access to critical data or all Helidon accessible data as well as unauthorized access to critical data or complete access to all Helidon accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 9.4 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Helidon (Oracle Fusion Middleware) - Imperative Web Serverto a version that resolves this vulnerability.Fixed in 4.4.1 - Compensating control
Because the vulnerability is exploitable via HTTP by an unauthenticated attacker with network access, restrict network access to the Helidon Imperative Web Server over HTTP (e.g., block/limit inbound HTTP from untrusted networks) until the affected version range (4.0.0-4.4.1) is remediated.
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An unauthenticated attacker with network access to the affected server over HTTP can exploit it. No privileges or user interaction are required.
Which supported version is identified as affected?
The affected supported version listed is Helidon Imperative Web Server 4.5.0.
What could successful exploitation allow?
An attacker could obtain unauthorized access to critical data or all data accessible to Helidon, and create, modify, or delete that data. Exploitation can also cause a partial denial of service.