EUVD-2026-62180
GHSA-8mfj-6rqp-8hrg
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Network-accessible HTTP/2 vector with no authentication or interaction required; high availability and low confidentiality impact match Oracle's described outcome.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 4.5.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 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 and unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 8.2 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H).
AnalysisAI
Remote denial-of-service and partial data exposure in Oracle Helidon 4.5.0 allows unauthenticated network attackers via HTTP/2 to cause a complete hang or crash of the Helidon Imperative Web Server, alongside unauthorized read access to a subset of accessible data. The vulnerability is classified as easily exploitable with no authentication, user interaction, or special configuration required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network access to a Helidon 4.5.0 instance running the Imperative Web Server component over HTTP/2 - no authentication, session token, or user interaction is needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H) scores 8.2 and accurately reflects the threat model: any unauthenticated attacker with HTTP/2 network access can trivially trigger a crash with no barriers. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An external attacker sends a specially crafted HTTP/2 request (or sequence of frames) to a publicly accessible Helidon 4.5.0 service running the Imperative Web Server. The malformed HTTP/2 interaction triggers a processing fault that causes the server to hang indefinitely or crash, taking the application offline. … |
| Remediation | Apply the patch or upgrade released by Oracle as part of the August 2026 Critical Security Patch Update, referenced at https://www.oracle.com/security-alerts/cspuaug2026.html - the exact patched version number is not independently confirmed in the available data and should be verified directly against the Oracle advisory. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of all systems running Oracle Helidon 4.5.0 using asset discovery tools and configuration management database queries; flag any internet-exposed instances for immediate network restriction. …
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Same weakness CWE-284 – Improper Access Control
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External POC / Exploit Code
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