What is the CVSS score of CVE-2026-73914?

CVE-2026-73914 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L. EPSS exploitation probability: 0.3%.

Oracle Helidon CVE-2026-73914

EUVD-2026-62158 MEDIUM

Improper Access Control (CWE-284)

2026-08-18 secalert_us@oracle.com

GHSA-qvq8-cm9m-p293

Denial Of Service Oracle Authentication Bypass Helidon

6.5

CVSS 3.1 · Vendor: oracle

Severity by source

Vendor (oracle) PRIMARY

6.5 MEDIUM

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

vuln.today AI

6.5 MEDIUM

Unauthenticated HTTP network access with partial confidentiality and availability impact only, no integrity loss, and scope unchanged per description.

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

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Aug 19, 2026 - 02:41 vuln.today

DescriptionCVE.org

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 4.5.0. 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 and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 6.5 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L).

AnalysisAI

Unauthenticated remote exploitation of Oracle Helidon 4.5.0's Imperative Web Server component allows attackers with HTTP network access to read a subset of application-accessible data and trigger partial denial of service conditions. The CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L vector confirms low-complexity, zero-authentication exploitation with no user interaction required. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Identify HTTP-accessible Helidon 4.5.0 endpoint

Delivery

Send crafted HTTP request to Imperative Web Server

Exploit

Trigger flaw in request handling logic

Execution

Extract partial application data

Impact

Cause partial service availability disruption

Access

Identify HTTP-accessible Helidon 4.5.0 endpoint

Delivery

Send crafted HTTP request to Imperative Web Server

Exploit

Trigger flaw in request handling logic

Execution

Extract partial application data

Impact

Cause partial service availability disruption

Vulnerability AssessmentAI

Exploitation	No special configuration, non-default feature enablement, or privileged deployment mode is required beyond a standard Helidon 4.5.0 deployment with the Imperative Web Server component accessible over HTTP. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 6.5 Medium score reflects meaningful but bounded impact: the vulnerability is network-exploitable (AV:N), low complexity (AC:L), requires no authentication (PR:N) and no user interaction (UI:N), but scope is unchanged (S:U) and impact is limited to partial confidentiality and availability loss with no integrity compromise. … 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 4.5.0 deployment sends a crafted HTTP request to the Imperative Web Server, triggering a flaw in request handling that leaks a subset of application-accessible data and degrades service availability. No proof-of-concept code has been publicly identified at time of analysis, but the low attack complexity (AC:L) and absence of authentication requirements mean exploitation is straightforward once the specific flaw mechanism is understood. …
Remediation	Apply Oracle's Critical Security Patch Update for August 2026, available at https://www.oracle.com/security-alerts/cspuaug2026.html, which addresses CVE-2026-73914 in Helidon 4.5.0. … Detailed patch versions, workarounds, and compensating controls in full report.