CVE-2026-101570

Helidon Web Server HTTP/2 Resource Exhaustion Vulnerability

Published Oct 20, 2026 CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Description
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webserver-http2). Supported versions that are affected are 4.0.0-4.5.5. Difficult to exploit 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 partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 3.7 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Helidon Web Server HTTP/2 Resource Exhaustion Vulnerability
Type Values Removed Values Added
Title Helidon Web Server HTTP/2 Vulnerability Allows Partial Denial of Service
Weaknesses CWE-770
Type Values Removed Values Added
Weaknesses CWE-400
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Helidon Web Server HTTP/2 Vulnerability Allows Partial Denial of Service
Weaknesses CWE-770
Type Values Removed Values Added
Description Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webserver-http2). Supported versions that are affected are 4.0.0-4.5.5. Difficult to exploit 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 partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 3.7 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).
First Time appeared Oracle
Oracle helidon
CPEs cpe:2.3:a:oracle:helidon:*:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle helidon
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
oracle
Published
Updated
Oct 29, 2026, 1:52 AM
Reserved
Sep 28, 2026, 3:40 PM
Status
Awaiting Analysis
Published
Oct 20, 2026, 10:18 PM
Modified
Oct 29, 2026, 2:16 AM