EUVD-2026-62179
GHSA-xg9h-qhxw-v8vr
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
HTTP endpoint requires no authentication or special conditions; impact is availability-only (crash/hang) with no confidentiality or integrity effects, consistent with DoS-only CWE class.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 4.5.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
AnalysisAI
Remote denial-of-service in Oracle Helidon 4.5.1's Imperative Web Server component allows unauthenticated network attackers to hang or repeatedly crash the service via HTTP. The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) confirms trivial, zero-prerequisite exploitation against any reachable instance. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Helidon 4.5.1 must be deployed using the Imperative Web Server component and accessible over HTTP from the attacker's network position. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 rating accurately reflects real-world exploitability: the AV:N/AC:L/PR:N/UI:N vector means any attacker with HTTP reachability can trigger the vulnerability with no authentication, no elevated complexity, and no required user interaction - conditions that translate directly to trivial, scriptable denial-of-service. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated external attacker sends a specially crafted HTTP request to an internet-exposed Helidon 4.5.1 service. The Imperative Web Server component fails to handle the malformed or adversarial input, triggering a hang or crash of the Java process. … |
| Remediation | Apply Oracle's Critical Security Patch Update issued in August 2026, available 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 all systems running Oracle Helidon 4.5.1 and verify network exposure; prioritize internet-facing instances for immediate isolation. …
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Same weakness CWE-284 – Improper Access Control
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External POC / Exploit Code
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