EUVD-2026-61466
GHSA-f533-m8hj-8h7q
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Network-reachable HTTP exploit with no credentials needed, but AC:H reflects non-trivial bypass conditions; no availability impact confirmed by description.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
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. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Helidon accessible data as well as unauthorized access to critical data or complete access to all Helidon accessible data. CVSS 3.1 Base Score 7.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).
AnalysisAI
Authentication bypass in Oracle Helidon 4.5.0's Imperative Web Server component allows unauthenticated network-accessible attackers to fully compromise both the confidentiality and integrity of all data accessible to the service. The vulnerability carries a CVSS 3.1 score of 7.4, tempered by high attack complexity (AC:H), meaning specific, non-trivial conditions must be satisfied for exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network-level HTTP access to an Oracle Helidon 4.5.0 instance using the Imperative Web Server component. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.4 (High) reflects a genuinely serious impact - full read and write access (C:H/I:H) to all Helidon-accessible data - but the AC:H metric is a meaningful mitigating signal: exploitation is not straightforward and requires the attacker to satisfy specific, non-trivial preconditions such as a particular request sequence, race condition, or configuration state. … 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 and apply the patch provided in Oracle's Critical Security Patch Update for August 2026 at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify and inventory all systems running Oracle Helidon 4.5.0, prioritizing those handling sensitive data; verify and reinforce network segmentation to restrict service accessibility to trusted networks only. …
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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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