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CVE-2026-56349— n8n - Guardrail Node Bypass via Crafted Input

Quick assessment

Affected
n8n 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 2.10.0之前版本存在输入验证错误漏洞，该漏洞源于Guardrail节点输入验证不足，可能导致攻击者绕过默认防护指令，最终用户可制作恶意输入绕过防护并破坏工作流完整性。

AI Predicted 7.5 Difficulty: Easy EPSS 0.47% · P39

Affected Version Matrix 2

VendorProduct Version RangeStatus
n8n n8n < 2.10.0 affected
2.10.0 unaffected
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I. Basic Information for CVE-2026-56349

Vulnerability Information
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Vulnerability Title
n8n - Guardrail Node Bypass via Crafted Input
Source: CVE Program / CVE List V5
Vulnerability Description
n8n before version 2.10.0 contains an input validation vulnerability in the Guardrail node that allows attackers to bypass default guardrail instructions. End users can craft malicious inputs to circumvent guardrail protections and compromise workflow integrity.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
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 2.10.0之前版本存在输入验证错误漏洞，该漏洞源于Guardrail节点输入验证不足，可能导致攻击者绕过默认防护指令，最终用户可制作恶意输入绕过防护并破坏工作流完整性。
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 n8n 0 ~ 2.10.0 -

II. Public POCs for CVE-2026-56349

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III. Intelligence Information for CVE-2026-56349

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Vendor Advisories for CVE-2026-56349 (1)

News Coverage for CVE-2026-56349 (1)

Same Patch Batch · n8n · 2026-07-15 · 5 CVEs total

CVE-2026-56352 6.4 MEDIUM n8n - Arbitrary File Read and Execution via ExecuteWorkflow localFile Parameter
CVE-2026-56353 4.8 MEDIUM n8n - Authentication Bypass in Chat Trigger Node
CVE-2026-59259 n8n - Permission Bypass via Expression Parser Mismatch in External Secrets
CVE-2026-59254 n8n - External Secrets Disclosure via Workflow Node Expressions

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n
Same weakness: CWE-20

V. Comments for CVE-2026-56349

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