---
title: "CVE-2026-83156: Oracle XML Developers Kit - Broken Access Control"
description: "Oracle XML Developers Kit in Oracle Database Server 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3 contains a vulnerability caused by improper access control, letting low privileged attackers with XDKC privilege and network access via Oracle Net take over the component, exploit requires XDKC privilege."
url: https://panop.io/threat-heartbeat/CVE-2026-83156/
---

# CVE-2026-83156 Oracle XML Developers Kit - Broken Access Control

Oracle XML Developers Kit in Oracle Database Server 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3 contains a vulnerability caused by improper access control, letting low privileged attackers with XDKC privilege and network access via Oracle Net take over the component, exploit requires XDKC privilege.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.32% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-83156)

## Details

Type

Broken Access Control

Impact

Information Disclosure, Data Tampering, Denial Of Service

CVSS vector

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

Published

15 September 2026

Updated

15 October 2026

Weakness

[CWE-284](https://cwe.mitre.org/data/definitions/284.html)

## Vendor fix

Update to the latest available version beyond 19.32, 21.23, or 23.26.3.

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-2026-83156](https://nvd.nist.gov/vuln/detail/CVE-2026-83156)
- [https://www.oracle.com/security-alerts/cspusep2026.html](https://www.oracle.com/security-alerts/cspusep2026.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

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