EUVD-2026-62129
GHSA-m64c-mc5f-5m36
Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Unauthenticated HTTP authentication bypass with no complexity; S:C reflects Helidon's gateway role; no availability impact confirmed in description.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
2DescriptionCVE.org
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 3.2.18. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. While the vulnerability is in Helidon, attacks may significantly impact additional products (scope change). 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 7.2 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N).
AnalysisAI
Authentication bypass in Oracle Helidon 3.2.18's Imperative Web Server allows remote unauthenticated attackers to read a subset of application data and make unauthorized modifications via HTTP, with a scope change indicating potential cascade impact to downstream services. The CVSS 3.1 score of 7.2 (High) is elevated by the scope change (S:C), reflecting Helidon's common role as a gateway or orchestrator in microservices architectures. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The vulnerability requires that the target is running Oracle Helidon version 3.2.18 specifically with the Imperative Web Server component active - deployments using only the Reactive Web Server are not confirmed affected. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.2 (High) is driven by the scope change (S:C) combined with a fully unauthenticated, network-accessible, low-complexity attack vector (AV:N/AC:L/PR:N/UI:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker with HTTP access to the Helidon 3.2.18 Imperative Web Server sends a specially crafted HTTP request that bypasses authentication enforcement, directly reaching protected API routes without valid credentials. The attacker reads a subset of accessible application data - such as user records or configuration artifacts - and issues unauthorized write operations to modify or insert data within the server's data scope. … |
| Remediation | Apply the Oracle Critical Patch Update for August 2026, documented at https://www.oracle.com/security-alerts/cspuaug2026.html, which addresses CVE-2026-73885 in Helidon 3.2.18. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: conduct an inventory of all Oracle Helidon 3.2.18 instances, prioritizing those with internet-facing or untrusted network access, and document exposure levels. …
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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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