EUVD-2026-62112
GHSA-vr3r-jqr6-5rrp
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Network-reachable HTTP service requiring no authentication yields AV:N/AC:L/PR:N/UI:N; impact is bounded to partial data read and write with no availability impact or scope change, yielding C:L/I:L/A:N/S:U.
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
Lifecycle Timeline
1DescriptionCVE.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
Authentication bypass in Oracle Helidon 4.5.0's Imperative Web Server component exposes HTTP endpoints to unauthenticated network attackers, enabling unauthorized read access to a subset of application data and unauthorized write, insert, or delete operations on accessible data. The flaw, tagged as an Authentication Bypass by Oracle and reported via the August 2026 Critical Patch Update, is reachable by any attacker with HTTP connectivity to the service with no complexity barriers. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Helidon application must be running exactly version 4.5.0 and must be using the Imperative Web Server component specifically - deployments using only the Reactive Web Server are not confirmed as affected by this advisory. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 6.5 (Medium) with vector AV:N/AC:L/PR:N/UI:N reflects a network-exploitable flaw requiring no authentication or user interaction, placing it among the more accessible vulnerability classes for opportunistic attackers. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker with HTTP network access to an exposed Helidon 4.5.0 Imperative Web Server instance sends crafted HTTP requests that circumvent the server's authentication layer, gaining read access to a portion of the application's data and the ability to insert, modify, or delete records accessible to the service. No public exploit code has been identified at time of analysis, but the low-complexity, no-authentication attack vector means a capable attacker could develop a working proof-of-concept through targeted HTTP request manipulation or review of changes introduced in Helidon 4.5.0. |
| Remediation | The primary remediation is to apply Oracle's August 2026 Critical Patch Update per the advisory at https://www.oracle.com/security-alerts/cspuaug2026.html; however, the available input data does not specify an exact patched release version number, so the precise fix version must be confirmed directly from Oracle's CPU documentation before deployment. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
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