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Oracle Helidon CVE-2026-71156

| EUVDEUVD-2026-62098 MEDIUM
Improper Access Control (CWE-284)
2026-08-18 secalert_us@oracle.com GHSA-4c3c-gqc7-7r8q
Authentication Bypass Oracle Helidon
5.3
CVSS 3.1 · Vendor: oracle
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Severity by source

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

AV:N and PR:N consistent with unauthenticated HTTP exploitation; I:L reflects partial unauthorized data writes with no confidentiality or availability impact confirmed.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

1
Analysis Generated
Aug 19, 2026 - 03:00 vuln.today

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. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Helidon accessible data. CVSS 3.1 Base Score 5.3 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N).

AnalysisAI

Unauthenticated remote data modification is possible in Oracle Helidon 3.2.19 via its Imperative Web Server component, exploitable over HTTP with no credentials or user interaction required. Successful exploitation allows an attacker to perform unauthorized insert, update, or delete operations on data accessible to the Helidon instance, with no confidentiality or availability impact. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation No authentication is required (PR:N per CVSS vector) and no user interaction is needed (UI:N). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 5.3 (Medium) accurately reflects a constrained impact profile: network-accessible with zero authentication or complexity barrier, but limited strictly to partial data integrity loss with no confidentiality or availability consequences. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Consult Oracle's Critical Security Patch Update for August 2026 at https://www.oracle.com/security-alerts/cspuaug2026.html and apply Oracle's recommended patch for Helidon 3.2.19. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-71156 vulnerability details – vuln.today
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