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CVE-2026-56349

n8n - Guardrail Node Bypass via Crafted Input

MEDIUM
6.3
CVSS Score
Published: July 15, 2026 at 11:25 AM UTC
Updated: October 25, 2026 at 03:10 PM UTC
1 product affected across 1 vendorN8N

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Severity
MEDIUM6.3
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

N8N· N8Nnpm
90%
v < 2.10.0
Vendor states this is fixed in 2.10.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://github.com/n8n-io/n8n/security/advisories/GHSA-fvfv-ppw4-7h2w
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/n8n-guardrail-node-bypass-via-crafted-input

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMVulnCheck
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-20

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