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Oracle Helidon CVE-2026-73867

| EUVDEUVD-2026-62111 MEDIUM
Improper Access Control (CWE-284)
2026-08-18 secalert_us@oracle.com GHSA-pfjh-wx53-q5xx
Authentication Bypass Oracle Helidon
6.5
CVSS 3.1 · Vendor: oracle
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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-accessible, no auth required per description and authentication bypass tag; partial confidentiality and integrity impact only; no availability impact stated.

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

1
Analysis Generated
Aug 19, 2026 - 02:58 vuln.today

DescriptionCVE.org

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 3.2.18. 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 network exploitation of Oracle Helidon 3.2.18's Imperative Web Server component allows remote attackers to bypass authentication controls, gaining unauthorized read access to a subset of application data and unauthorized write/insert/delete capability against some accessible data. Tagged as an authentication bypass by Oracle Security (secalert_us@oracle.com), the vulnerability requires no privileges and no user interaction, making it trivially automatable over HTTP. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify Helidon 3.2.18 HTTP endpoint
Delivery
Send unauthenticated HTTP request
Exploit
Bypass Imperative Web Server authentication
Execution
Read subset of accessible application data
Impact
Insert or modify accessible data records
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Vulnerability AssessmentAI

Exploitation No special conditions are required for exploitation beyond network HTTP access to the Helidon Imperative Web Server - the CVSS vector AV:N/AC:L/PR:N/UI:N confirms remote unauthenticated exploitation against instances of Helidon 3.2.18 running the Imperative Web Server component. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 score of 6.5 with vector AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N indicates low exploitation complexity and no authentication requirement, which aligns with the 'Authentication Bypass' tag and the Oracle description of 'easily exploitable vulnerability allows unauthenticated attacker.' The impact is moderate - partial confidentiality and integrity compromise with no availability impact - which caps the base score at 6.5. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An unauthenticated remote attacker identifies a target running Oracle Helidon 3.2.18 with the Imperative Web Server exposed over HTTP. The attacker sends crafted HTTP requests that bypass the server's authentication checks, directly accessing protected endpoints to enumerate or exfiltrate a subset of application data, or to inject or modify records the application manages. …
Remediation Apply Oracle's August 2026 Critical Patch Update, which addresses CVE-2026-73867 per the advisory at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-73867 vulnerability details – vuln.today
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