# CVE-2026-21999

> Vulnerability · severity: **MEDIUM** (CVSS 5.3).

## Description

Vulnerability in the XML Database component of Oracle Database Server.  Supported versions that are affected are 23.4.0-23.26.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTPS to compromise XML Database.  Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in  unauthorized access to critical data or complete access to all XML Database accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N).

## Key facts

- **CVE ID:** CVE-2026-21999
- **Published:** 2026-04-21
- **CVSS severity:** MEDIUM
- **CVSS base score:** 5.3
- **CWE codes:** CWE-200

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-21999

## Citation

> AI Analytics. CVE-2026-21999. Retrieved 2026-07-19 from https://api.ai-analytics.org/cve/CVE-2026-21999. Derived from NIST NVD. Licensed CC0.

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