CVE-2026-83458

Medium

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: JSON). Supported versions that are affected are 4.0.0-4.5.4. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

SeverityMedium

CVSS5.3

Exploit probability—

Product

Oracle Helidon

PublishedSep 15, 2026

First seenSep 15, 2026

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Vendor advisories

oracle.com/security-alerts/cspusep2026.html

Affected products

Product	Affected versions	Fixed in
oracle helidon	4.0.0 ≤ v ≤ 4.5.4	—

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