EUVD-2026-79767
GHSA-hvpf-xwmf-xgpx
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Network-reachable WebSocket endpoints need no authentication or user interaction, and impact is confined to partial availability loss.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
1DescriptionNVD
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: WebSocket). Supported versions that are affected are 4.0.0-4.5.4. 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 partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).
AnalysisAI
Unauthenticated attackers with network access to HTTP endpoints can cause a partial denial of service in Oracle Helidon versions 4.0.0 through 4.5.4 by abusing the WebSocket component. The flaw carries a CVSS 3.1 base score of 5.3 (AV:N/AC:L/PR:N/UI:N, availability-only partial impact) and requires no credentials or user interaction, making it trivially automatable against any reachable WebSocket-enabled service. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the target application to expose a network-reachable HTTP endpoint backed by Helidon's WebSocket component in version 4.0.0 through 4.5.4; the application must actually have WebSocket handling enabled or a WebSocket endpoint registered, since a Helidon service that never activates the WebSocket module has no attack surface for this flaw. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - maximum network reachability and zero prerequisites, but only a partial availability impact, which is why the score lands at a moderate 5.3 rather than high. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply Oracle's Critical Security Patch Update published at https://www.oracle.com/security-alerts/cspusep2026.html, which is the authoritative source for the exact patched Helidon release; the supplied intelligence lists 4.0.0-4.5.4 as the vulnerable range, so upgrade to the fixed build named in that advisory rather than assuming the next patch release number. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same technique Denial Of Service
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External POC / Exploit Code
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