EUVD-2026-62157
GHSA-g8xm-v739-p223
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Network-reachable with low privileges required; partial confidentiality and integrity loss only; no availability impact; unscoped, consistent with a server-side authorization bypass.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
CVSS:3.1/AV:N/AC:L/PR:L/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 low privileged 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 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).
AnalysisAI
Unauthorized data access in Oracle Helidon 4.5.0's Imperative Web Server component allows low-privileged network attackers to read a subset of accessible data and perform unauthorized insert, update, or delete operations via HTTP. Tagged as an Authentication Bypass by Oracle Security, the flaw is rated Medium (CVSS 5.4) with low attack complexity, meaning any attacker holding even minimal credentials can trivially exploit it without user interaction. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid low-privileged account with network access to the Helidon 4.5.0 Imperative Web Server over HTTP (PR:L, AV:N per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N) presents a coherent picture: network-reachable, trivially exploitable by any authenticated low-privilege user, with no user interaction needed and no availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained low-privilege credentials for a Helidon 4.5.0 deployment - through credential stuffing, phishing, or reuse from another service - sends specially crafted HTTP requests to the Imperative Web Server that bypass the authorization layer, accessing records belonging to other users or elevated permission tiers. With the same technique, the attacker inserts, modifies, or deletes data they are not authorized to change. … |
| Remediation | Apply Oracle's Critical Security Patch Update for August 2026, available at https://www.oracle.com/security-alerts/cspuaug2026.html, which contains the official patch for this vulnerability. … 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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