CVE-2026-71161Network attack vector

Partial service interrupt to unauthenticated attackers

Published Aug 18, 2026 · Updated Aug 19, 2026

Denial of service in the Imperative Web Server in Oracle Helidon 3.2.18 allows remote attackers to partially interrupt service via HTTP. Oracle has not published the flawed code path or request pattern, and the public CVE and advisory records do not identify the operation that mishandles input. Exposure is limited to deployments running the 3.2.18 Imperative Web Server; the published vector shows unauthenticated network reachability and availability-only impact.

CVSS severity5.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Imperative Web Server in Oracle Helidon 3.2.18 allows remote attackers to partially interrupt service via HTTP. Oracle has not published the flawed code path or request pattern, and the public CVE and advisory records do not identify the operation that mishandles input. Exposure is limited to deployments running the 3.2.18 Imperative Web Server; the published vector shows unauthenticated network reachability and availability-only impact.

The record

CVE
CVE-2026-71161
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Oracle
Product
Helidon
Classifications
CWE-284, T1499
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

5.3OracleCVSS: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.

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
T1499Endpoint Denial of Service

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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