What is the CVSS score of EUVD-2026-62103?

EUVD-2026-62103 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:N/I:N/A:L. EPSS exploitation probability: 0.4%.

Oracle Helidon EUVD-2026-62103

| CVE-2026-71161 MEDIUM

Improper Access Control (CWE-284)

2026-08-18 secalert_us@oracle.com

GHSA-qhvm-w52f-fhx5

Authentication Bypass Denial Of Service 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:N/I:N/A:L

vuln.today AI

5.3 MEDIUM

HTTP listener is network-exposed with no auth or interaction required; impact is strictly partial availability, no confidentiality or integrity effects confirmed.

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

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Aug 19, 2026 - 02:59 vuln.today

DescriptionCVE.org

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

AnalysisAI

Helidon 3.2.18's Imperative Web Server component exposes an unauthenticated, network-accessible denial-of-service condition via HTTP that allows remote attackers to partially degrade service availability without any credentials or user interaction. Only the Availability dimension is affected - Confidentiality and Integrity remain intact - classifying this as a medium-severity partial DoS. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

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Exploit

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Impact

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Access

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Exploit

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Impact

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Vulnerability AssessmentAI

Exploitation	No authentication is required and no special configuration must be enabled beyond running Helidon 3.2.18 with the Imperative Web Server component active and accessible over HTTP - the CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms remote unauthenticated exploitation against the default HTTP interface. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 3.1 base score of 5.3 (Medium) is consistent with the single-dimension, low-magnitude availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation	The primary remediation is to apply the fix identified in Oracle's Critical Security Patch Update for August 2026, available at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report.