CVE-2026-73901: 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. Difficult to exploit 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. CVSS 3.1 Base Score 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).
Affected Software
Event History
Frequently Asked Questions
Which deployments should be checked first?
Check Oracle Helidon deployments using the Imperative Web Server component at supported version 4.5.1.
What does an attacker need to exploit this issue?
An unauthenticated attacker needs network access to the affected service over HTTP. No privileges or user interaction are required, but exploitation has high attack complexity.
What could a successful attack allow?
A successful attack can provide unauthorized read access to a subset of Helidon-accessible data and unauthorized update, insert, or delete access to some Helidon-accessible data.