CVE-2026-71154

Local low-privilege data access and modification

Published Aug 18, 2026 · Updated Aug 20, 2026

Improper access control in the Imperative Web Server in Oracle Helidon 4.5.0 allows local users to read and modify accessible data. Oracle has not published the flawed endpoint, class, or authorization check; the public Oracle and GitHub records disclose only that access restrictions fail within the web server component. Exploitation requires low privileges and logon to the infrastructure hosting Helidon, so exposure is limited to local users rather than remote HTTP clients.

CVSS severity6.1
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in the Imperative Web Server in Oracle Helidon 4.5.0 allows local users to read and modify accessible data. Oracle has not published the flawed endpoint, class, or authorization check; the public Oracle and GitHub records disclose only that access restrictions fail within the web server component. Exploitation requires low privileges and logon to the infrastructure hosting Helidon, so exposure is limited to local users rather than remote HTTP clients.

The record

CVE
CVE-2026-71154
Published
Aug 18, 2026
Updated
Aug 20, 2026
Vendor
Oracle
Product
Helidon
Classifications
CWE-284
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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=4.5.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Oracle · Helidonversion=4.5.0

Published CVSS scores

6.1OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control

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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