What is the CVSS score of EUVD-2026-62144?

EUVD-2026-62144 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.2%.

Oracle Helidon EUVD-2026-62144

| CVE-2026-73900 MEDIUM

Improper Access Control (CWE-284)

2026-08-18 secalert_us@oracle.com

GHSA-2c9h-jvvw-2c3f

Authentication Bypass Oracle Helidon

5.3

CVSS 3.1 · Vendor: oracle

Severity by source

Vendor (oracle) PRIMARY

5.3 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

vuln.today AI

5.3 MEDIUM

Unauthenticated HTTP access with no special conditions warrants AV:N/AC:L/PR:N/UI:N; only partial confidentiality impact applies with no integrity or availability effect.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Aug 19, 2026 - 02:44 vuln.today

DescriptionCVE.org

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 4.5.1. 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).

AnalysisAI

Unauthorized read access to application data is achievable against Oracle Helidon 4.5.1's Imperative Web Server component via unauthenticated HTTP requests. The vulnerability, tagged as an Authentication Bypass, allows remote attackers with network access to retrieve a subset of data without credentials, as confirmed by the CVSS vector (AV:N/AC:L/PR:N/UI:N). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Identify Helidon 4.5.1 Imperative Web Server endpoint

Exploit

Send unauthenticated HTTP request

Execution

Bypass authentication enforcement in server component

Impact

Receive unauthorized data subset in response

Access

Identify Helidon 4.5.1 Imperative Web Server endpoint

Exploit

Send unauthenticated HTTP request

Execution

Bypass authentication enforcement in server component

Impact

Receive unauthorized data subset in response

Vulnerability AssessmentAI

Exploitation	Exploitation requires network-level HTTP access to a running Oracle Helidon 4.5.1 instance using the Imperative Web Server component. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 5.3 score reflects a medium-severity confidentiality impact: network-accessible, zero-authentication, low-complexity exploitation, but bounded to partial data exposure (C:L) with no integrity or availability consequence. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An unauthenticated attacker with HTTP access to a Helidon 4.5.1 Imperative Web Server sends a crafted HTTP request to an endpoint that should require authentication, exploiting the authentication bypass to receive a response containing a subset of application data. Because the CVSS vector specifies AV:N/AC:L/PR:N/UI:N, no special tooling, credentials, or victim interaction are required - a standard HTTP client suffices. …
Remediation	Patch available per Oracle's Critical Patch Update (CPU) for August 2026, accessible at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report.