XML Database Vulnerability in Oracle Database Server
CVE-2026-21999

5.3MEDIUM

Key Information:

Vendor

Oracle
Status
Oracle Database Server
Vendor
CVE Published:
21 April 2026

What is CVE-2026-21999?

A vulnerability exists in the XML Database component of Oracle Database Server versions 23.4.0 through 23.26.1. This vulnerability allows an unauthenticated attacker with network access via HTTPS to compromise the XML Database. Exploiting this vulnerability requires human interaction from an individual other than the attacker. Successful exploitation may lead to unauthorized access to sensitive data or full access to all data that the XML Database exposes, raising significant concerns for data confidentiality and security.

Affected Version(s)

Oracle Database Server 23.4.0 <= 23.26.1

References

https://www.oracle.com/security-alerts/cpuapr2026.html
vendor-advisory

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.