CVE-2026-71164Network attack vector

Unauthenticated takeover via undisclosed HTTP flaw

Published Aug 18, 2026 · Updated Aug 19, 2026

Vulnerability in the Imperative Web Server component in Oracle Helidon 3.2.18 allows remote attackers to take over the server via HTTP. Oracle and the public CVE records do not disclose the vulnerable handler or the incorrect operation on untrusted input, so the precise takeover path remains unpublished. Exposure requires network reachability to an affected Helidon HTTP service and no authentication or user interaction, with stated impact bounded to complete compromise of the Helidon process and its accessible data and availability.

CVSS severity9.8
Critical
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Vulnerability in the Imperative Web Server component in Oracle Helidon 3.2.18 allows remote attackers to take over the server via HTTP. Oracle and the public CVE records do not disclose the vulnerable handler or the incorrect operation on untrusted input, so the precise takeover path remains unpublished. Exposure requires network reachability to an affected Helidon HTTP service and no authentication or user interaction, with stated impact bounded to complete compromise of the Helidon process and its accessible data and availability.

The record

CVE
CVE-2026-71164
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Oracle
Product
Helidon
Classifications
CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=3.2.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle · Helidonversion=3.2.18

Published CVSS scores

9.8OracleCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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