CVE-2026-83330: 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. in Oracle Corporation Helidon
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 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).
AI Analysis
Technical Summary
This vulnerability in Oracle Helidon (WebSocket component) versions 4.0.0 to 4.5.4 allows an unauthenticated attacker with network access via HTTP to cause a hang or frequent crash, resulting in a complete denial of service. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) indicates network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Oracle has addressed this vulnerability in its September 2026 Critical Security Patch Update, which includes patches for Helidon versions 3.0.0-3.2.20 and 4.0.0-4.5.4 among other products.
Potential Impact
Successful exploitation results in denial of service by causing Helidon to hang or crash repeatedly, impacting availability. There is no confidentiality or integrity impact. The vulnerability is exploitable remotely without authentication.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the September 2026 Critical Security Patch Update. Users of Helidon versions 4.0.0 through 4.5.4 should apply the official patches promptly to remediate the issue. No alternative mitigations or workarounds are specified in the advisory.
CVE-2026-83330: 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. in Oracle Corporation Helidon
Description
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 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).
CVSS v3.1
Score 7.5high
Affected software
Oracle Corporation
Helidon
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Oracle Helidon (WebSocket component) versions 4.0.0 to 4.5.4 allows an unauthenticated attacker with network access via HTTP to cause a hang or frequent crash, resulting in a complete denial of service. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) indicates network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Oracle has addressed this vulnerability in its September 2026 Critical Security Patch Update, which includes patches for Helidon versions 3.0.0-3.2.20 and 4.0.0-4.5.4 among other products.
Potential Impact
Successful exploitation results in denial of service by causing Helidon to hang or crash repeatedly, impacting availability. There is no confidentiality or integrity impact. The vulnerability is exploitable remotely without authentication.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the September 2026 Critical Security Patch Update. Users of Helidon versions 4.0.0 through 4.5.4 should apply the official patches promptly to remediate the issue. No alternative mitigations or workarounds are specified in the advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-08-31T15:40:57.353Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.oracle.com/security-alerts/cspusep2026.html","vendor":"Oracle"}]
Threat ID: 6aa9a84155bf5e2cf5538181
Added to database: 09/15/2026, 20:19:13 UTC
Last enriched: 09/15/2026, 23:03:24 UTC
Last updated: 09/15/2026, 23:32:04 UTC
Views: 2
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