Description
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.5.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. 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 7.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
Published: 2026-08-18
Score: 7.3 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The flaw resides in the Imperative Web Server component of Oracle Helidon. Supported versions 4.0.0 to 4.5.2 are vulnerable. An unauthenticated attacker with network access via HTTP can add, modify, or delete data, read a subset of protected data, and induce a partial denial of service. This occurs due to missing or incorrect access‑control checks, classified as CWE‑284.

Affected Systems

Oracle Helidon versions 4.0.0 through 4.5.2 are affected. No other vendors or product variants are listed.

Risk and Exploitability

The CVSS v3.1 Base Score of 7.3 reflects moderate confidentiality, integrity, and availability impacts with low attack complexity and zero required privileges. The EPSS score, being less than 1 %, suggests a low probability of exploitation in the wild, yet the requirement for only HTTP network access and absence of authentication makes the vulnerability remotely exploitable from any external network. The vulnerability is not listed in the CISA KEV catalog, indicating no known widespread exploitation at this time.

Generated by OpenCVE AI on August 28, 2026 at 22:38 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest Oracle Helidon security patch or upgrade to a newer release that fixes the access‑control flaw
  • Block or limit external HTTP traffic to Helidon services via firewalls or ACLs to confine exposure to trusted networks
  • Enable mandatory authentication for Helidon or its web‑server component and audit logs for unauthorized data changes or denial‑of‑service attempts

Generated by OpenCVE AI on August 28, 2026 at 22:38 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 28 Aug 2026 23:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Access Control Failure in Oracle Helidon

Fri, 28 Aug 2026 19:45:00 +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 4.5.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. 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 7.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L). Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.5.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. 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 7.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
CPEs cpe:2.3:a:oracle:helidon:*:*:*:*:*:*:*:*

Thu, 20 Aug 2026 14:45:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Exploit in Oracle Helidon 4.5.3 Enables Data Modification, Read, and Partial Denial of Service

Thu, 20 Aug 2026 03:30:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Exploit in Oracle Helidon 4.5.3 Enables Data Modification, Read, and Partial Denial of Service

Wed, 19 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Access Enables Unauthorized Modification and Partial Denial of Service in Oracle Helidon 4.5.3
Weaknesses CWE-287

Wed, 19 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Wed, 19 Aug 2026 08:15:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Access Enables Unauthorized Modification and Partial Denial of Service in Oracle Helidon 4.5.3
Weaknesses CWE-284
CWE-287

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 4.5.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. 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 7.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
First Time appeared Oracle
Oracle helidon
CPEs cpe:2.3:a:oracle:helidon:4.5.3:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle helidon
References
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

Subscriptions

Oracle Helidon
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-08-28T17:33:08.192Z

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

Link: CVE-2026-73933

cve-icon Vulnrichment

Updated: 2026-08-19T12:07:49.414Z

cve-icon NVD

Status : Modified

Published: 2026-08-18T21:18:26.340

Modified: 2026-08-28T20:19:51.700

Link: CVE-2026-73933

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T22:45:05Z

Weaknesses