Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.
CVE-2026-67631 · GHSA-9wr9-7c42-p6f9 · EUVD-2026-73185 · published 8 Sept 2026
How serious is it
- Severity: critical, CVSS score 9.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-67631?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Microsoft Microsoft SQL Server 2025 (CU8): 17.0.0.0 <17.0.4085.5
- Microsoft Microsoft SQL Server 2019 (GDR): 15.0.0 <15.0.2190.7
- Microsoft Microsoft SQL Server 2019 (CU 32): 15.0.0.0 <15.0.4490.9
- Microsoft Microsoft SQL Server 2025 for x64-based Systems (GDR): 17.0.1050.2 <17.0.1135.8
- Microsoft Microsoft SQL Server 2022 (CU 26): 16.0.0.0 <16.0.4275.2
- Microsoft Microsoft SQL Server 2017 (CU 31): 14.0.0 <14.0.3550.4
- Microsoft Microsoft SQL Server 2017 (GDR): 14.0.0 <14.0.2130.4
- Microsoft Microsoft SQL Server 2022 (GDR): 16.0.0 <16.0.1200.5
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
Merged from ENISA EUVD. Last updated 27 Oct 2026. All vulnerabilities · RSS · JSON