Oracle Helidon 4.5.3 Imperative Web Server improper authentication

Summaryinfo

A vulnerability categorized as critical has been discovered in Oracle Helidon 4.5.3. Affected by this issue is some unknown functionality of the component Imperative Web Server. Executing a manipulation can lead to improper authentication. This vulnerability is registered as CVE-2026-73931. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Oracle Helidon 4.5.3. It has been declared as critical. This vulnerability affects an unknown functionality of the component Imperative Web Server. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. 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 4.5.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. While the vulnerability is in Helidon, attacks may significantly impact additional products (scope change). 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 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L).

The advisory is available at oracle.com. This vulnerability was named CVE-2026-73931 since 08/13/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. 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).

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

• 4.5.3

License

• commercial

Website

• Vendor: https://www.oracle.com

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