CVE-2026-26116: SQL Server Elevation of Privilege Vulnerability
Improper neutralization of special elements used in an sql command ('sql injection') in SQL Server allows an authorized attacker to elevate privileges over a network.
Other sources
SQL Server Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Modify application code to use parameterized queries (prepared statements) and perform proper input validation/encoding to prevent SQL injection against SQL Server.
Application / Database access use_parameterized_queries = true - Configuration
Restrict database and service account privileges to the minimum necessary (principle of least privilege); avoid granting application accounts elevated or DBA roles.
SQL Server database_account_privileges = least-privilege - Compensating control
Restrict network access to SQL Server to only trusted hosts and management networks using firewall rules and network ACLs; block access from untrusted or public networks.
- Compensating control
Deploy a Web Application Firewall (WAF) or intrusion prevention system (IPS) to detect and block SQL injection attempts targeting applications that interact with SQL Server.
- Operational
Audit database and application logs for suspicious activity, review accounts and roles for possible compromise, and rotate credentials/secrets if compromise is suspected or as part of remediation.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-26116?
CVE-2026-26116 is classified as an elevation of privilege vulnerability in SQL Server.
How do I fix CVE-2026-26116?
To fix CVE-2026-26116, you should apply the latest security update or patch provided by Microsoft for your affected SQL Server version.
Which SQL Server versions are affected by CVE-2026-26116?
CVE-2026-26116 affects multiple versions of SQL Server, including 2016, 2017, 2019, 2022, and 2025.
What type of attack is associated with CVE-2026-26116?
CVE-2026-26116 allows authorized attackers to perform SQL injection attacks to elevate their privileges.
What should I do if I believe I am vulnerable to CVE-2026-26116?
If you believe you are vulnerable to CVE-2026-26116, immediately patch your SQL Server and follow best security practices.