What is the CVSS score of CVE-2026-73910?

CVE-2026-73910 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 CVE-2026-73910

EUVD-2026-62154 MEDIUM

Improper Access Control (CWE-284)

2026-08-18 secalert_us@oracle.com

GHSA-w49h-h9pw-v899

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 HTTP endpoint with no auth required; impact limited to partial confidentiality with no integrity or availability change.

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 - 02:42 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 data in Oracle Helidon 4.5.1's Imperative Web Server component is achievable by unauthenticated network attackers via HTTP, exploiting what the vendor tags as an authentication bypass condition. The affected version is precisely 4.5.1 of Oracle's Java microservices framework, and the vulnerability exposes a subset of data accessible to the server without requiring any credentials or user interaction. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Identify network-exposed Helidon 4.5.1 instance

Exploit

Send unauthenticated HTTP request to Imperative Web Server

Execution

Trigger authentication bypass in request handling

Impact

Receive unauthorized data subset from server

Access

Identify network-exposed Helidon 4.5.1 instance

Exploit

Send unauthenticated HTTP request to Imperative Web Server

Execution

Trigger authentication bypass in request handling

Impact

Receive unauthorized data subset from server

Vulnerability AssessmentAI

Exploitation	Exploitation requires network-level HTTP access to an instance of Oracle Helidon 4.5.1 running the Imperative Web Server component; the CVSS vector AV:N/AC:L/PR:N/UI:N confirms no authentication, no elevated complexity, and no user interaction are required. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 3.1 base score of 5.3 (Medium) reflects a real but bounded risk: the attack vector is network with no authentication barrier and no complexity, which are the highest-concern factors, but the impact is constrained to partial confidentiality loss with no write or denial-of-service capability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An unauthenticated attacker with network access to a Helidon 4.5.1 service sends a crafted HTTP request to the Imperative Web Server component that bypasses authentication controls, causing the server to return data it should have restricted. Depending on what data the Helidon application exposes via that component, this could include API responses, configuration fragments, or application state. …
Remediation	The primary remediation is to apply the patch released by Oracle as part of the August 2026 Critical Patch Update, referenced at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report.