Description
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 3.0.0-3.2.18. 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).
Published: 2026-08-18
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

Oracle Helidon, part of Oracle Fusion Middleware, contains a flaw in its Imperative Web Server component that allows an unauthenticated attacker with network access via HTTP to read a subset of Helidon accessible data. Supported versions 3.0.0 through 3.2.18 are affected. This vulnerability is an information‑exposure flaw that impacts confidentiality and corresponds to CWE‑284, an improper authorization issue.

Affected Systems

Helidon versions 3.0.0 through 3.2.18 are affected. The product is distributed by Oracle Corporation and is referenced in Oracle’s official security advisory for August 2026.

Risk and Exploitability

The CVSS v3.1 score of 5.3 indicates a moderate risk to confidentiality. The EPSS score of less than 1% suggests a low likelihood that the vulnerability is currently being exploited, and the issue is not listed in the CISA KEV catalog. The attack vector is likely a simple HTTP request from an external network; no authentication, privileges, or special user interface are required. Organizations facing this risk can mitigate unauthorized data exposure by applying the official patch or by limiting network exposure.

Generated by OpenCVE AI on August 28, 2026 at 21:48 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply a patch or upgrade to a version newer than 3.2.18.
  • Restrict network access to the Helidon instance by placing it behind a firewall or reverse proxy and allowing only trusted IP ranges to reach its HTTP port.
  • Monitor Helidon access logs for unexpected read attempts and enforce audit controls to detect potential exploitation.

Generated by OpenCVE AI on August 28, 2026 at 21:48 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 28 Aug 2026 22:15:00 +0000

Type Values Removed Values Added
Title Helidon Information Disclosure via HTTP

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 3.2.19. 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). Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 3.0.0-3.2.18. 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).
CPEs cpe:2.3:a:oracle:helidon:*:*:*:*:*:*:*:*

Fri, 21 Aug 2026 03:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Data Exposure in Oracle Helidon

Thu, 20 Aug 2026 22:15:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Data Exposure in Oracle Helidon

Thu, 20 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284
Metrics ssvc

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

Thu, 20 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Data Exposure in Oracle Helidon
Weaknesses CWE-200

Thu, 20 Aug 2026 02:15:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Data Exposure in Oracle Helidon
Weaknesses CWE-200

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

Type Values Removed Values Added
Title Oracle Helidon vulnerability permits unauthenticated HTTP data read
Weaknesses CWE-200

Wed, 19 Aug 2026 06:30:00 +0000

Type Values Removed Values Added
Title Oracle Helidon vulnerability permits unauthenticated HTTP data read
Weaknesses CWE-200

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 3.2.19. 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).
First Time appeared Oracle
Oracle helidon
CPEs cpe:2.3:a:oracle:helidon:3.2.19:*:*:*:*:*:*:*
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:L/I:N/A:N'}

Subscriptions

Oracle Helidon
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-08-28T18:30:04.726Z

Reserved: 2026-08-13T18:41:45.885Z

Link: CVE-2026-73899

cve-icon Vulnrichment

Updated: 2026-08-20T18:11:31.516Z

cve-icon NVD

Status : Modified

Published: 2026-08-18T21:18:22.543

Modified: 2026-08-28T20:19:49.283

Link: CVE-2026-73899

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T22:00:15Z

Weaknesses