CVE-2026-71162Network attack vector

Unauthorized data access via OIDC tenant fallback

Published Aug 18, 2026 · Updated Aug 19, 2026

Improper access control in the Imperative Web Server in Oracle Helidon 3.2.18 allows remote attackers to read or modify data via HTTP. Oracle has not published a per-CVE root cause, but the contemporaneous 3.2.19 security fixes change OIDC tenant resolution to reject unknown tenant IDs instead of silently using the default tenant configuration before metadata discovery. Exposure is limited to deployments that use the affected OIDC multi-tenant flow; exploitation is network-reachable without authentication and is bounded to unauthorized data access rather than service interruption.

CVSS severity6.5
Medium
EPSS probability0.27%
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 3.2.18 allows remote attackers to read or modify data via HTTP. Oracle has not published a per-CVE root cause, but the contemporaneous 3.2.19 security fixes change OIDC tenant resolution to reject unknown tenant IDs instead of silently using the default tenant configuration before metadata discovery. Exposure is limited to deployments that use the affected OIDC multi-tenant flow; exploitation is network-reachable without authentication and is bounded to unauthorized data access rather than service interruption.

The record

CVE
CVE-2026-71162
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

6.5NVDCVSS:3.1/AV:N/AC:H/PR:N/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)
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.

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Technologies

Your stack

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Your stack

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