Vulnerability in the Helidon product of Oracle Fusion Middleware (component: WebSocket). 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).

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00411.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Oracle Corporation Helidon affected
Version Status Constraints
4.0.0 affected ≤ 4.5.4

Configuration 1 [-]

cpe:2.3:a:oracle:helidon:*:*:*:*:*:*:*:*

No data.

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Vendors Products
Oracle Subscribe
Helidon Subscribe

Project Subscriptions

Vendors Products
Oracle Subscribe
Helidon Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.oracle.com/security-alerts/cspusep2026.html cve-icon cve-icon
History

Sun, 20 Sep 2026 07:45:00 +0000

Type Values Removed Values Added
Title Helidon WebSocket Unauthenticated Endpoint Causes Resource Exhaustion Denial of Service

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 18 Sep 2026 16:45:00 +0000

Type Values Removed Values Added
Title Helidon WebSocket Component Allows Unauthenticated HTTP Clients to Trigger Partial Denial of Service
Weaknesses CWE-290

Wed, 16 Sep 2026 17:45:00 +0000

Type Values Removed Values Added
Title Helidon WebSocket Component Allows Unauthenticated HTTP Clients to Trigger Partial Denial of Service
Weaknesses CWE-290

Tue, 15 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
Description Vulnerability in the Helidon product of Oracle Fusion Middleware (component: WebSocket). 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).
First Time appeared Oracle
Oracle helidon
CPEs cpe:2.3:a:oracle:helidon:*:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle helidon
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-09-18T16:13:57.381Z

Reserved: 2026-08-31T15:40:57.361Z

Link: CVE-2026-83480

cve-icon Vulnrichment

Updated: 2026-09-18T16:11:48.140Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-15T20:18:55.697

Modified: 2026-09-25T19:27:37.587

Link: CVE-2026-83480

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-20T07:30:17Z

Weaknesses