What is the CVSS score of CVE-2026-73875?

CVE-2026-73875 has a CVSS 3.1 base score of 7.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.3%.

Which versions of Oracle Helidon are affected by CVE-2026-73875?

Oracle Helidon 3.2.19 contains a critical authentication bypass vulnerability accessible remotely without credentials, enabling unauthorized data theft and modification.

How to fix or mitigate CVE-2026-73875?

Within 24 hours, identify all systems running Oracle Helidon 3.2.19 and assess network accessibility; enable enhanced HTTP request logging and configure security alerts for suspicious authentication patterns. Within 7 days, restrict network access to Helidon instances through firewall rules, deploy an API gateway or reverse proxy in front of affected services to enforce re-authentication, and enable Web Application Firewall rules blocking suspicious patterns. Within 30 days, establish upgrade pathways by testing Helidon migration to patched versions in non-production environments, monitor Oracle security advisories for patch availability, and plan production deployment timeline.

Oracle Helidon CVE-2026-73875

EUVD-2026-62119 HIGH

Improper Access Control (CWE-284)

2026-08-18 secalert_us@oracle.com

GHSA-v8pg-8qmf-xrqp

Authentication Bypass Oracle Helidon

7.2

CVSS 3.1 · Vendor: oracle

Severity by source

Vendor (oracle) PRIMARY

7.2 HIGH

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

vuln.today AI

7.2 HIGH

HTTP network exposure with no auth or interaction required; scope change reflects microservices pivot risk; no availability impact described by Oracle.

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

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Aug 18, 2026 - 22:11 vuln.today

CVE Published

Aug 18, 2026 - 21:18 nvd

HIGH 7.2

DescriptionCVE.org

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 3.2.19. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. While the vulnerability is in Helidon, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Helidon accessible data as well as unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 7.2 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N).

AnalysisAI

Unauthenticated network exploitation of Oracle Helidon 3.2.19's Imperative Web Server component allows remote attackers to bypass authentication over HTTP, gaining unauthorized read access to a subset of data and the ability to insert, update, or delete accessible data. The CVSS S:C scope change is particularly significant: in microservices environments where Helidon acts as a service layer, successful exploitation may cascade to impact downstream or co-located systems beyond the initially compromised component. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Identify Helidon 3.2.19 Imperative Web Server on network

Delivery

Send crafted unauthenticated HTTP request

Exploit

Bypass authentication control

Execution

Read subset of accessible data or modify records

Impact

Leverage compromised service identity to reach downstream systems

Access

Identify Helidon 3.2.19 Imperative Web Server on network

Delivery

Send crafted unauthenticated HTTP request

Exploit

Bypass authentication control

Execution

Read subset of accessible data or modify records

Impact

Leverage compromised service identity to reach downstream systems

Vulnerability AssessmentAI

Exploitation	Oracle confirms only Helidon version 3.2.19 with the Imperative Web Server component as affected. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 3.1 score of 7.2 is driven by the fully permissive attack profile (AV:N/AC:L/PR:N/UI:N) combined with the scope change (S:C), partially offset by low rather than high confidentiality and integrity impacts (C:L/I:L) and no availability impact (A:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An unauthenticated attacker on the network sends a crafted HTTP request to a Helidon 3.2.19 Imperative Web Server endpoint, triggering the authentication bypass to gain unauthorized access. The attacker then reads a subset of data accessible to the Helidon service and performs unauthorized data modifications. …
Remediation	Apply Oracle's Critical Security Patch Update for August 2026, referenced at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, identify all systems running Oracle Helidon 3.2.19 and assess network accessibility; enable enhanced HTTP request logging and configure security alerts for suspicious authentication patterns. …

Threat intelligence, references, and detailed analysis are available after sign-in.