EUVD-2026-61671
GHSA-2pj2-hr5m-8xgg
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Network-reachable authentication bypass with integrity-only impact; AC:H reflects non-trivial triggering conditions despite absence of authentication or user interaction requirements.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
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. 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. CVSS 3.1 Base Score 5.9 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N).
AnalysisAI
Integrity-bypassing authentication flaw in Oracle Helidon 4.5.0's Imperative Web Server component allows unauthenticated remote attackers to create, delete, or modify critical application data via HTTP, despite requiring high attack complexity to trigger. The CVSS vector (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N) confirms the attack is network-reachable without credentials but is gated behind difficult-to-replicate exploitation conditions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation specifically requires the target to be running Oracle Helidon version 4.5.0 with the Imperative Web Server component deployed as the HTTP server (not Helidon's Nima or reactive server variants). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.9 score reflects high attack complexity (AC:H), which is the dominant risk-limiting factor: exploitation is not reliable under arbitrary conditions and requires specific environmental or protocol states to trigger. … 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 to obtain and apply Oracle's official patch; an exact fixed version number was not independently confirmed from the available intelligence data and must be verified directly against the Oracle advisory 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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