CVE-2026-21999

Medium

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).

SeverityMedium
CVSS5.3
Exploit probability—
ProductOracle Xml Database
PublishedApr 21, 2026
First seenApr 21, 2026

How to fix

Affected products

ProductAffected versionsFixed in
oracle xml_database23.4 ≤ v ≤ 23.26.1—

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