CVE-2026-88084: Microsoft SQL Server Denial of Service Vulnerability
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
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 15.0.2200.2Patch KB5128495 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 17.0.5015.4Patch KB5126967 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 17.0.1145.4Patch KB5128492 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.4305.5Patch KB5126934 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.1210.3Patch KB5128493 - 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 14.0.3560.2Patch KB5128496 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 14.0.2140.2Patch KB5128497
Event History
Frequently Asked Questions
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.
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.