CVE-2026-83458Network attack vectorHinoki check available

Unauthenticated service interruption

Published Sep 15, 2026 · Updated Sep 15, 2026

Denial of service in Oracle Helidon 4.0.0 through 4.5.4 allows remote attackers to interrupt service by sending HTTP requests. Oracle identifies the JSON component but has not published the request shape, parser path, or incorrect operation that triggers the availability loss. No authentication or user interaction is required, and the reported consequence is limited to partial service interruption.

CVSS severity5.3
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in Oracle Helidon 4.0.0 through 4.5.4 allows remote attackers to interrupt service by sending HTTP requests. Oracle identifies the JSON component but has not published the request shape, parser path, or incorrect operation that triggers the availability loss. No authentication or user interaction is required, and the reported consequence is limited to partial service interruption.

The record

CVE
CVE-2026-83458
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Oracle Corporation
Product
Helidon
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.0 <=4.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Helidonversion=4.0.0 <=4.5.4

Published CVSS scores

5.3Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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