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CVE-2026-54312— n8n: Microsoft SQL Node Prototype Pollution

Quick assessment

Affected
n8n-io n8n
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

n8n是n8n公司开源的一个可扩展的工作流自动化工具。 n8n 2.24.0之前版本存在输入验证错误漏洞，该漏洞源于通过Microsoft SQL节点提供特制值作为table参数导致全局原型污染，可能导致经身份验证的用户创建或修改工作流时造成应用程序范围验证失败，使n8n实例完全无法运行直至重启。

AI Predicted 8.1 Difficulty: Easy EPSS 0.40% · P31

Affected Version Matrix 1

VendorProduct Version RangeStatus
n8n-io n8n < 2.24.0 affected
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I. Basic Information for CVE-2026-54312

Vulnerability Information
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Vulnerability Title
n8n: Microsoft SQL Node Prototype Pollution
Source: CVE Program / CVE List V5
Vulnerability Description
n8n is an open source workflow automation platform. Prior to 2.24.0, an authenticated user with permission to create or modify workflows could achieve global prototype pollution via the Microsoft SQL node by supplying a crafted value as the table parameter. This pollutes Object.prototype process-wide for the lifetime of the n8n server process, causing application-wide validation failures and rendering the n8n instance completely non-functional until restarted. This vulnerability is fixed in 2.24.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n公司开源的一个可扩展的工作流自动化工具。 n8n 2.24.0之前版本存在输入验证错误漏洞，该漏洞源于通过Microsoft SQL节点提供特制值作为table参数导致全局原型污染，可能导致经身份验证的用户创建或修改工作流时造成应用程序范围验证失败，使n8n实例完全无法运行直至重启。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
n8n-io n8n < 2.24.0 -

II. Public POCs for CVE-2026-54312

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III. Intelligence Information for CVE-2026-54312

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Vendor Advisories for CVE-2026-54312 (1)

Same Patch Batch · n8n-io · 2026-06-23 · 21 CVEs total

CVE-2026-54314 n8n: Denial of Service via ZIP decompression in webhook workflow
CVE-2026-44791 n8n: XML Node Prototype Pollution Patch Bypass
CVE-2026-44789 n8n: HTTP Request Node Pagination Prototype Pollution to RCE
CVE-2026-44792 n8n: Source Control Pull SQL Injection
CVE-2026-44790 n8n: Arbitrary File Read via Git Node
CVE-2026-49444 n8n: Python sandbox escape
CVE-2026-49465 n8n: Git Node Clone and Push Operations Bypass File Sandbox
CVE-2026-54304 n8n: SecurityScorecard Node Leaks API Token to User-Controlled Host
CVE-2026-54301 n8n: Same-Origin XSS in Respond to Webhook Node
CVE-2026-54310 n8n: SQL Injection in Postgres v1/TimesclaeDB Nodes
CVE-2026-45732 n8n: Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints
CVE-2026-54302 n8n: Stored XSS in Chat Trigger Node
CVE-2026-54306 n8n: Prototype Pollution enables confused-deputy execution via public webhooks
CVE-2026-54313 n8n: NoSQL Injection in MongoDB Node Find And Replace Operation
CVE-2026-54303 n8n: Reflected XSS via Facebook, WhatsApp, and Microsoft Teams Trigger Webhook Verificatio
CVE-2026-54305 n8n: Cross-Tenant Credential Takeover via Dynamic Credentials EE Endpoints
CVE-2026-54307 n8n: Credential Exfiltration via Permission Bypass
CVE-2026-54308 n8n: Missing Token Validation on Microsoft Agent 365 Trigger Node
CVE-2026-54309 n8n: n8n MCP Browser HTTP Transport Exposes Unauthenticated Browser-Control Sessions
CVE-2026-54311 n8n: Merge Node SQL Mode Prototype Pollution

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-1321

V. Comments for CVE-2026-54312

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