TI-2026-40712 Aliases CVE-2026-56349 GHSA-9v3h-fx77-8r29

n8n - Guardrail Node Bypass via Crafted Input

LOW 28CWE-20Published 2026-07-15 · Updated 2026-07-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: None · Low · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00472 41st percentileScored 2026-11-07

Fix Fixed n8n (n8n): 2.10.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
n8n	n8n	before 2.10.0	2.10.0	Patch available	CNA

n8n Vendorn8n Affected before 2.10.0 Fixed in 2.10.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:n8n:n8n::::::::	—	—	n8n

cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:* Versions — — ·n8n

Remediation

Fix · CNA n8n (n8n) Fixed in 2.10.0

Timeline

2026-10-02 Threatist record created from CVE-2026-56349
2026-10-03 Alias added: GHSA-9v3h-fx77-8r29

References

Advisory 1

GitHub Security Advisory (GHSA-fvfv-ppw4-7h2w)

TI-2025-42131 n8n Vulnerable to Remote Code Execution via Expression Injection KEVCVSS 3.1CRITICAL 10.0
TI-2026-17560 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling CVSS 3.1CRITICAL 10.0
TI-2026-01167 Authenticated users can bypass the Expression sandbox mechanism to achieve full remote… CVSS 3.1CRITICAL 9.9
TI-2026-00644 Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host. CVSS 3.1CRITICAL 9.9
TI-2026-82991 Code execution in n8n via deprecated Function nodes CVSS 4.0HIGH 8.7
TI-2025-35293 An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3… CVSS 3.1HIGH 8.8

See all 233 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences