Oracle Helidon 4.5.0 Imperative Web Server improper authorization

Summaryinfo

A vulnerability described as problematic has been identified in Oracle Helidon 4.5.0. This vulnerability affects unknown code of the component Imperative Web Server. Executing a manipulation can lead to improper authorization. This vulnerability is tracked as CVE-2026-71154. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability was found in Oracle Helidon 4.5.0. It has been declared as problematic. This vulnerability affects an unknown code block of the component Imperative Web Server. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 4.5.0. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Helidon executes to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Helidon accessible data as well as unauthorized update, insert or delete access to some of Helidon accessible data. CVSS 3.1 Base Score 6.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N).

The advisory is available at oracle.com. This vulnerability was named CVE-2026-71154 since 08/05/2026. The exploitation appears to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 08/19/2026). This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Oracle

Name

• Helidon

Version

• 4.5.0

License

• commercial

Website

• Vendor: https://www.oracle.com

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