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 unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon and unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 8.2 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H).
History

Thu, 20 Aug 2026 04:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP/2 Exploit Grants DoS and Data Exposure in Helidon 4.5.0

Wed, 19 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP/2 Exploit Grants DoS and Data Exposure in Helidon 4.5.0

Wed, 19 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 18 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
Description 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 unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon and unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 8.2 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H).
First Time appeared Oracle
Oracle helidon
CPEs cpe:2.3:a:oracle:helidon:4.5.0:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle helidon
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-08-19T14:40:10.503Z

Reserved: 2026-08-13T18:41:45.891Z

Link: CVE-2026-73937

cve-icon Vulnrichment

Updated: 2026-08-19T13:59:30.484Z

cve-icon NVD

Status : Received

Published: 2026-08-18T21:18:26.800

Modified: 2026-08-19T15:18:06.840

Link: CVE-2026-73937

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-20T03:45:17Z