Oracle Helidon 3.2.18 Imperative Web Server information disclosure

Summaryinfo

A vulnerability marked as problematic has been reported in Oracle Helidon 3.2.18. This affects an unknown function of the component Imperative Web Server. This manipulation causes information disclosure. The identification of this vulnerability is CVE-2026-73871. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Oracle Helidon 3.2.18. It has been declared as problematic. Affected by this vulnerability is an unknown code of the component Imperative Web Server. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 3.2.18. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

The advisory is shared at oracle.com. This vulnerability is known as CVE-2026-73871 since 08/13/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/19/2026). MITRE ATT&CK project uses the attack technique T1592 for this issue.

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

• 3.2.18

License

• commercial

Website

• Vendor: https://www.oracle.com

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