---
title: "CVE-2026-101583: Oracle Fusion Middleware Helidon - Broken Access Control"
description: "Oracle Fusion Middleware Helidon 4.0.0-4.5.5 and 27.0.0 contains an unauthorized data modification and partial denial of service vulnerability in helidon-common-mapper, letting unauthenticated attackers with network HTTP access modify critical data, read some data, and cause partial DoS, exploit requires high attack complexity."
url: https://panop.io/threat-heartbeat/CVE-2026-101583/
---

# CVE-2026-101583 Oracle Fusion Middleware Helidon - Broken Access Control

Oracle Fusion Middleware Helidon 4.0.0-4.5.5 and 27.0.0 contains an unauthorized data modification and partial denial of service vulnerability in helidon-common-mapper, letting unauthenticated attackers with network HTTP access modify critical data, read some data, and cause partial DoS, exploit requires high attack complexity.

CVSS base score 7.0 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-101583)

## Details

Type

Broken Access Control

Impact

Information Disclosure, Data Tampering, Denial Of Service

CVSS vector

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

Published

20 October 2026

Updated

21 October 2026

## Vendor fix

Update to the latest version of Oracle Fusion Middleware Helidon.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-101583](https://nvd.nist.gov/vuln/detail/CVE-2026-101583)
- [https://www.oracle.com/security-alerts/cpuoct2026.html](https://www.oracle.com/security-alerts/cpuoct2026.html)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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