What is the CVSS score of EUVD-2026-62139?

EUVD-2026-62139 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: 0.3%.

Oracle Helidon EUVD-2026-62139

| CVE-2026-73895 MEDIUM

Improper Access Control (CWE-284)

2026-08-18 secalert_us@oracle.com

GHSA-3848-7f54-jqqv

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

Network-reachable, no complexity or privilege needed per description; confidentiality-only impact with no integrity or availability effect confirmed.

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 - 02:46 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 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 data exposure in Oracle Helidon 3.2.18's Imperative Web Server component allows unauthenticated network attackers to read a subset of application-accessible data via HTTP. Tagged as an authentication bypass, the vulnerability is trivially exploitable with no complexity barriers - any attacker with HTTP access to the service can trigger it. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Identify Helidon 3.2.18 HTTP service

Delivery

Send unauthenticated HTTP request to protected endpoint

Exploit

Authentication check bypassed in Imperative Web Server

Execution

Server returns restricted data subset

Impact

Attacker reads confidential application data

Access

Identify Helidon 3.2.18 HTTP service

Delivery

Send unauthenticated HTTP request to protected endpoint

Exploit

Authentication check bypassed in Imperative Web Server

Execution

Server returns restricted data subset

Impact

Attacker reads confidential application data

Vulnerability AssessmentAI

Exploitation	No authentication is required and no special configuration is needed - the CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms remote unauthenticated exploitation against default configurations of Oracle Helidon 3.2.18 running the Imperative Web Server over HTTP. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 3.1 base score of 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) accurately reflects a medium-severity, network-reachable information disclosure flaw with zero exploitation complexity - no credentials, no user interaction, and no special conditions required. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An unauthenticated attacker with HTTP network access to a Helidon 3.2.18 application sends a crafted HTTP request to an endpoint on the Imperative Web Server that should be access-controlled. Due to the authentication bypass flaw, the server responds with data the attacker should not be authorized to view - such as internal configuration values, API responses, or application state. …
Remediation	Apply the patch released by Oracle as part of the Critical Security Patch Update for August 2026, available through the Oracle advisory at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report.