EUVD-2026-62156
GHSA-f57v-xr52-p9g9
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor describes easily exploitable unauthenticated HTTP-based full takeover, so AV:N/AC:L/PR:N/UI:N with High confidentiality, integrity, and availability impact.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.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 takeover of Helidon. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
AnalysisAI
Remote takeover of Oracle Helidon 4.5.0 is possible when an unauthenticated attacker reaches the Imperative Web Server component over HTTP, per Oracle's August 2026 Critical Patch Update. The flaw yields full compromise of confidentiality, integrity, and availability (CVSS 9.8) without credentials or user interaction. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires only network HTTP access to an Oracle Helidon 4.5.0 deployment whose Imperative Web Server (Helidon SE web server) is reachable by the attacker - no authentication (PR:N), no user interaction (UI:N), and low attack complexity (AC:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals point to a genuine high priority rather than an inflated CVSS score: the CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N with High impact across all three dimensions describes trivially reachable, unauthenticated, network-based full takeover, which Oracle itself characterizes as 'easily exploitable.' Working against panic, there is no EPSS score, no POC, and no CISA KEV listing supplied, so active or automated exploitation is not evidenced - the danger is potential, not yet observed. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker scans for internet-exposed Helidon SE services and sends a crafted HTTP request to the Imperative Web Server endpoint, requiring no credentials and no user interaction. The request triggers the flaw in request handling, resulting in full compromise of the service and the data it processes. … |
| Remediation | Apply Oracle's August 2026 Critical Patch Update fix for Helidon as the primary remediation - a patch is available per the vendor advisory, though the exact fixed version number is not stated in the available data and should be taken directly from https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Oracle Helidon 4.5.0 instances and restrict network access to the Imperative Web Server component using firewall rules and network segmentation; enable enhanced monitoring for exploitation attempts. …
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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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