CVE-2026-88084: Microsoft SQL Server Denial of Service Vulnerability
Published Oct 13, 2026
·Updated
Allocation of resources without limits or throttling in SQL Server allows an authorized attacker to deny service over a network.
Other sources
Microsoft SQL Server Denial of Service Vulnerability
— Microsoft
Affected Software
3 affected componentsFixes available
Microsoft SQL Server 2019 (CU32)<15.0.4500.2
15.0.4500.2
Microsoft SQL Server 2025 (CU8)
Microsoft SQL Server 2019<15.0.2200.2
15.0.2200.2
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.0.4500.2Patch KB5128494 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.0.2200.2Patch KB5128495
Event History
Oct 13, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·08:37 PM
Data Sourced
via MITRE·08:37 PM
DescriptionSeverity
Frequently Asked Questions
1
Which SQL Server deployments are identified as affected?
The affected software list includes Microsoft SQL Server 2019, Microsoft SQL Server 2019 CU32, and Microsoft SQL Server 2025 CU8.
2
What level of access does an attacker need?
An attacker must be authorized and able to reach the SQL Server instance over the network. The attack complexity is rated high and no user interaction is required.