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CVE-2026-67629 Microsoft CVE debrief

Microsoft SQL Server Information Disclosure Vulnerability allows an authorized attacker to disclose information over a network due to an out-of-bounds read in SQL Server. This vulnerability impacts SQL Server deployments, requiring defenders to assess exposure and prioritize patching. The CVE record and NVD entry provide details, but additional verification is needed to confirm affected versions and deployments. Affected versions include Microsoft SQL Server 2017 (CU 31), 2017 (GDR), 2019 (CU 32), 2019 (GDR), 2022 (CU 26), 2022 (GDR), 2025 (CU8), and 2025 for x64-based Systems (GDR).

Vendor
Microsoft
Product
Microsoft SQL Server 2017 (CU 31)
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-10-08
Advisory published
2026-09-08
Advisory updated
2026-10-08

Who should care

Defenders responsible for SQL Server deployments should assess exposure and prioritize patching due to the potential for information disclosure. This includes reviewing the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. They should also plan vendor-supported updates or mitigations through normal change control where exposure is confirmed and review compensating  

Why it matters

The vulnerability allows an authorized attacker to disclose information over a network due to an out-of-bounds read in SQL Server. Defenders should prioritize verifying exposure in SQL Server deployments and applying vendor patches.

  • Verify exposure in SQL Server deployments
  • Apply vendor patches to prevent information disclosure
  • Monitor for potential information disclosure

Technical summary

The vulnerability allows an authorized attacker to disclose information over a network due to an out-of-bounds read in SQL Server. Affected versions include Microsoft SQL Server 2017 (CU 31), 2017 (GDR), 2019 (CU 32), 2019 (GDR), 2022 (CU 26), 2022 (GDR), 2025 (CU8), and 2025 for x64-based Systems (GDR).

Defensive priority

Defenders should prioritize verifying exposure in SQL Server deployments and applying vendor patches.

Recommended defensive actions

  • Verify SQL Server deployments for exposure
  • Apply vendor patches
  • Monitor for potential information disclosure

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional verification is needed to confirm affected versions and deployments.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-67629 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-67629

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-67629 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-67629

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Microsoft SQL Server Information Disclosure Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/67xxx/CVE-2026-67629.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67629

    Supplemental source - vendor-advisory, patch

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.