What is the CVSS score of CVE-2026-73893?

CVE-2026-73893 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:L/A:N. EPSS exploitation probability: 0.3%.

Oracle Helidon CVE-2026-73893

EUVD-2026-62137 MEDIUM

Improper Access Control (CWE-284)

2026-08-18 secalert_us@oracle.com

GHSA-wx48-r7f4-pjw4

Authentication Bypass Oracle 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:L/A:N

vuln.today AI

6.5 MEDIUM

Network-reachable authentication bypass with no prerequisites; partial data read and write impact only, no availability loss and no scope change.

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

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 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 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 6.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N).

AnalysisAI

Unauthenticated remote exploitation of Oracle Helidon 4.5.0's Imperative Web Server component allows network-adjacent attackers to bypass authentication and perform unauthorized read and write operations on application data over HTTP. Tagged explicitly as an Authentication Bypass by Oracle's security team, this vulnerability exposes a subset of Helidon-accessible data to disclosure and tampering without requiring credentials or user interaction. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Identify internet-exposed Helidon 4.5.0 endpoint

Delivery

Send crafted HTTP request to Imperative Web Server

Exploit

Bypass authentication enforcement

Execution

Read subset of application data

Impact

Modify or delete accessible application records

Access

Identify internet-exposed Helidon 4.5.0 endpoint

Delivery

Send crafted HTTP request to Imperative Web Server

Exploit

Bypass authentication enforcement

Execution

Read subset of application data

Impact

Modify or delete accessible application records

Vulnerability AssessmentAI

Exploitation	Exploitation requires network-level HTTP access to a Helidon 4.5.0 instance running the Imperative Web Server component - no authentication, no user interaction, and no elevated privileges are needed. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 3.1 base score of 6.5 (Medium) reflects real but bounded impact - partial confidentiality and integrity compromise with no availability impact and unchanged scope. … 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 4.5.0 service sends a specially crafted HTTP request to the Imperative Web Server component that bypasses the authentication enforcement mechanism. The attacker is then able to read a subset of application data or insert, update, or delete records accessible to the Helidon service - without ever presenting valid credentials. …
Remediation	Consult the Oracle Critical Security Patch Update advisory for August 2026 at https://www.oracle.com/security-alerts/cspuaug2026.html for the vendor-released fix version; an exact patched release number is not independently confirmed in the available data, so defer to the official CPU documentation. … Detailed patch versions, workarounds, and compensating controls in full report.