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Oracle Helidon CVE-2026-73911

| EUVDEUVD-2026-62155 MEDIUM
Improper Access Control (CWE-284)
2026-08-18 secalert_us@oracle.com GHSA-qp6m-x3x8-hmvx
5.4
CVSS 3.1 · Vendor: oracle
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Severity by source

Vendor (oracle) PRIMARY
5.4 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
vuln.today AI
5.4 MEDIUM

PR:L confirmed by description ('low privileged attacker'); C:L/I:L reflect partial data impacts with no availability or scope change indicated.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/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:L/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

1
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 4.5.0. Easily exploitable vulnerability allows low privileged 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 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).

AnalysisAI

Unauthorized data access and manipulation in Oracle Helidon 4.5.0's Imperative Web Server allows low-privileged network attackers to read restricted data and perform unauthorized insert, update, or delete operations via HTTP. Tagged as an authentication bypass, the flaw enables authenticated users to exceed their intended authorization scope within the Helidon application. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain low-privilege HTTP credentials
Exploit
Send crafted HTTP request to Imperative Web Server
Execution
Bypass per-resource authorization controls
Impact
Read restricted application data or submit unauthorized data modifications

Vulnerability AssessmentAI

Exploitation Exploitation requires a valid low-privilege account with network access to the Oracle Helidon 4.5.0 Imperative Web Server over HTTP - authentication is required (PR:L per CVSS), but no elevated or administrative privileges are needed. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 5.4 (Medium) accurately reflects the bounded nature of this vulnerability: impacts are limited to partial confidentiality and integrity (C:L/I:L) with no availability impact and no scope change (S:U). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with a valid low-privilege application account sends crafted HTTP requests to the Oracle Helidon 4.5.0 Imperative Web Server, exploiting the authorization bypass to access endpoints or data objects restricted to higher-privilege roles. The attacker reads data they are not authorized to view or submits requests that insert, update, or delete application records beyond their permitted scope. …
Remediation Apply the Oracle Critical Patch Update for August 2026, which addresses CVE-2026-73911 in Helidon 4.5.0; the advisory is at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-73911 vulnerability details – vuln.today

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