---
id: "CVE-2026-70003"
page: "https://infrastack.ai/live/CVE-2026-70003"
kind: "vulnerability"
aliases: ["CVE-2026-70003"]
title: "Microsoft JDBC Driver for SQL Server: signature check flaw lets attacker bypass security"
severity: "high"
cvss: 8.7
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "mssql-jdbc", "fixed": ["13.6.0"], "affected": "< 13.6.0", "ecosystem": "maven"}]
ecosystems: []
tags: ["java", "jdbc", "mssql-jdbc", "package", "sql-server"]
not_affected_if: ["auth-required"]
published_at: "2026-11-10T19:21:20+00:00"
first_seen_at: "2026-11-10T19:25:17+00:00"
updated_at: "2026-11-10T21:15:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-70003", "first_seen_at": "2026-11-10T19:25:17+00:00"}, {"source": "analyst", "url": "https://cveawg.mitre.org/api/cve/CVE-2026-70003", "first_seen_at": "2026-11-10T21:15:49+00:00", "cites": ["https://cveawg.mitre.org/api/cve/CVE-2026-70003", "https://github.com/microsoft/mssql-jdbc/releases"]}]
exploit_sources: []
---

# Microsoft JDBC Driver for SQL Server: signature check flaw lets attacker bypass security

Link for people: https://infrastack.ai/live/CVE-2026-70003 (this .md is for agents)

The Microsoft JDBC Driver for SQL Server does not properly verify a cryptographic signature. An unauthorized attacker on the network can bypass a security feature that depends on that check.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- maven:mssql-jdbc affected < 13.6.0 fixed 13.6.0

## How to check

Find the mssql-jdbc (com.microsoft.sqlserver:mssql-jdbc) version in pom.xml, build.gradle or the lock/dependency tree (mvn dependency:tree, gradle dependencies). Versions below 13.6.0 are listed as affected in the CVE record. Also check for fat jars or app-server lib folders that bundle the driver.

## Fix

Upgrade mssql-jdbc to 13.6.0 or later (13.6.2 is the current stable as of 2026-11-02). Per the CVE record, 13.6.0 is the first unaffected version; the MSRC page could not be read, so this is not vendor-verified.

## Timeline

- 2026-11-10T19:25:17+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-70003
- 2026-11-10T21:15:49+00:00 analyst https://cveawg.mitre.org/api/cve/CVE-2026-70003 — CVE record (CNA Microsoft): CWE-347, affected < 13.6.0, CVSS 8.7 (AV:N/AC:H/S:C). MSRC page is JS-only and unreadable via WebFetch; GitHub release notes do not mention the CVE. The security feature guarded is not stated in any source I could read (14.1.0 notes mention hardened Always Encrypted attestation token validation, which is only a possible link). Nothing verified. Version range wording in the CVE record was odd ('13.4 from 1.0.0'), so check the MSRC page by hand. Web search and X were not used.

## Documents

- [advisory] CVE record CVE-2026-70003 (CNA: Microsoft) https://cveawg.mitre.org/api/cve/CVE-2026-70003
- [describes] mssql-jdbc releases https://github.com/microsoft/mssql-jdbc/releases

## From the sources

Improper verification of cryptographic signature in JDBC Driver for SQL Server allows an unauthorized attacker to bypass a security feature over a network.

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