CVE-2026-67648: CWE-908: Use of Uninitialized Resource in Microsoft Microsoft SQL Server 2017 (CU 31)
Description
CVE-2026-67648 is a medium severity vulnerability in Microsoft SQL Server 2017 (CU 31) involving the use of an uninitialized resource. This flaw allows an authorized attacker to disclose information over a network. The vulnerability affects multiple versions of Microsoft SQL Server 2017 and later, with official patches available from Microsoft.
CVSS v3.1
Score 6.5medium
Affected software
Microsoft
Microsoft SQL Server 2017 (CU 31)
Microsoft
Microsoft SQL Server 2017 (GDR)
Microsoft
Microsoft SQL Server 2019 (CU 32)
Microsoft
Microsoft SQL Server 2019 (GDR)
Microsoft
Microsoft SQL Server 2022 (CU 26)
Microsoft
Microsoft SQL Server 2022 (GDR)
Microsoft
Microsoft SQL Server 2025 (CU8)
Microsoft
Microsoft SQL Server 2025 for x64-based Systems (GDR)
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Weaknesses
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Technical Analysis
This vulnerability (CVE-2026-67648) is classified under CWE-908 (Use of Uninitialized Resource) and affects Microsoft SQL Server 2017 (CU 31) and related versions. It allows an attacker with authorized access to the SQL Server to potentially disclose sensitive information over the network due to improper initialization of resources. The CVSS v3.1 base score is 6.5, indicating a medium severity level. The vulnerability requires low attack complexity and privileges but no user interaction. Microsoft has released official fixes addressing this issue.
Potential Impact
An authorized attacker can exploit this vulnerability to disclose sensitive information over the network. There is no impact on integrity or availability reported. The vulnerability does not require user interaction and has low attack complexity, but it does require privileges on the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security updates provided by Microsoft for the affected versions of SQL Server 2017 and later. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67648 for detailed patch information and guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-29T22:49:19.797Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67648","vendor":"Microsoft"}]
Threat ID: 6aa044d0acd9273b49fa7bd0
Added to database: 09/08/2026, 17:24:32 UTC
Last enriched: 10/16/2026, 20:52:26 UTC
Last updated: 10/21/2026, 13:40:30 UTC
Views: 29
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