EUVD-2026-62126
GHSA-62hf-3432-5r3m
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable HTTP service, no authentication or interaction required, impact is exclusively complete availability loss with no confidentiality or integrity effects.
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 3.2.19. 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
Denial-of-service in Oracle Helidon 3.2.19's Imperative Web Server component allows remote unauthenticated attackers to cause a complete hang or repeatable crash via HTTP, fully disrupting service availability. The vulnerability requires no authentication, no user interaction, and no special configuration, making it trivially exploitable against any network-accessible Helidon 3.2.19 instance. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions are required beyond network reachability to the Helidon HTTP port. … 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:N/I:N/A:H reflects a high-severity, easily exploitable network-based denial-of-service: no authentication, no complexity barrier, no user interaction required, with complete availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with network access to a Helidon 3.2.19 HTTP endpoint sends a crafted HTTP request - or a sequence of requests - that triggers a hang or crash within the Imperative Web Server's request-handling path, causing the service to become unresponsive or terminate. The attack requires no credentials or prior access, and given the AC:L rating, is likely repeatable and automatable, potentially enabling sustained denial of service. … |
| Remediation | Apply the fix documented in the Oracle Critical Patch Update for 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, inventory all Oracle Helidon 3.2.19 deployments and assess network exposure; restrict network access to trusted sources if possible. …
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External POC / Exploit Code
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