CVE-2026-110840

7.0High

Published 14 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash

7.0High

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Impact: Limited impact
Weakness: CWE-89

Impact

Remote unauthenticated callers can execute arbitrary SQL on connected Microsoft SQL databases with the workflow credential's permissions. To trigger it, an attacker needs network access to trigger a workflow that feeds untrusted input into the Query field.

Root cause

Version 1 of the Microsoft SQL node interpolates Query field expression values directly into raw SQL text without parameterization.

Affected systems

n8n before 2.41.4 and 2.42.x before 2.42.1

CVSS v4.0 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Fix & remediation

Upgrade n8n to version 2.41.4, 2.42.1, or later. If you cannot immediately upgrade, audit workflows to stop binding untrusted input (such as webhooks) directly to Microsoft SQL node version 1 Query fields.

shell

$ npm install -g n8n@latest

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

n8n before 2.41.4 and 2.42.x before 2.42.1 contains an SQL injection vulnerability in version 1 of the Microsoft SQL node, which substitutes Query field expression values directly into SQL text without parameterisation. When a workflow binds untrusted input such as webhook fields to the Query field, unauthenticated external callers can execute arbitrary SQL against the connected database with the stored credential's privileges.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-110840