CVE-2026-71157Network attack vector

Unauthenticated data disclosure via GraphQL defaults

Published Aug 18, 2026 · Updated Aug 19, 2026

Authentication bypass in Oracle Helidon 4.5.0 allows remote attackers to read a subset of application data via HTTP GraphQL requests. In the Imperative Web Server's GraphQlService routing, the /graphql and schema endpoints were exposed without authentication by default; the 4.5.1 fix wraps those handlers with authentication unless graphql.permit-all is explicitly enabled. Exposure requires a reachable GraphQL endpoint in the application and the published impact is limited to unauthorized read access, not data modification or service interruption.

CVSS severity5.3
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Oracle Helidon 4.5.0 allows remote attackers to read a subset of application data via HTTP GraphQL requests. In the Imperative Web Server's GraphQlService routing, the /graphql and schema endpoints were exposed without authentication by default; the 4.5.1 fix wraps those handlers with authentication unless graphql.permit-all is explicitly enabled. Exposure requires a reachable GraphQL endpoint in the application and the published impact is limited to unauthorized read access, not data modification or service interruption.

The record

CVE
CVE-2026-71157
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=4.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle · Helidonversion=4.5.0

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

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Technologies

Your stack

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Your stack

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