What is the CVSS score of CVE-2026-73872?

CVE-2026-73872 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-2026-73872

EUVD-2026-62116 MEDIUM

Improper Access Control (CWE-284)

2026-08-18 secalert_us@oracle.com

GHSA-pf2f-jqjq-5x4r

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-exposed HTTP service requiring no authentication; impact confined entirely to partial confidentiality with no integrity or availability consequence.

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 - 02:50 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. 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 disclosure in Oracle Helidon 4.5.0 affects the Imperative Web Server component, enabling unauthenticated network attackers to read a subset of accessible application data via HTTP. Tagged as an authentication bypass, the flaw requires no privileges or user interaction, making it trivially reachable from any network vantage point. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Identify exposed Helidon 4.5.0 HTTP service

Exploit

Send unauthenticated HTTP request to protected endpoint

Execution

Bypass access control gate in Imperative Web Server

Impact

Receive unauthorized data subset in response

Access

Identify exposed Helidon 4.5.0 HTTP service

Exploit

Send unauthenticated HTTP request to protected endpoint

Execution

Bypass access control gate in Imperative Web Server

Impact

Receive unauthorized data subset in response

Vulnerability AssessmentAI

Exploitation	No authentication is required - the CVSS vector (PR:N/AC:L/UI:N) confirms unauthenticated exploitation at low complexity with no victim interaction. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 3.1 score of 5.3 (Medium) reflects an important balance: the attack path is maximally accessible - network-reachable, unauthenticated, low complexity, no user interaction - yet the impact is bounded to partial confidentiality loss with no integrity or availability consequences. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An unauthenticated attacker with HTTP access to a Helidon 4.5.0 Imperative Web Server sends a crafted or standard HTTP request that bypasses intended access controls, receiving a response containing a subset of internal data - such as application configuration, internal routing information, or service metadata - without supplying credentials. No public proof-of-concept is available, but the low-complexity, zero-authentication CVSS vector suggests the bypass technique is straightforward to discover through routine HTTP enumeration or fuzzing of exposed endpoints.
Remediation	Consult the Oracle Critical Patch Update advisory at https://www.oracle.com/security-alerts/cspuaug2026.html to obtain the patched Helidon release addressing CVE-2026-73872. … Detailed patch versions, workarounds, and compensating controls in full report.