CVE-2026-56349 n8n - Guardrail Node Bypass via Crafted Input
Attackers can bypass n8n Guardrail node protections by crafting malicious inputs, compromising workflow integrity and security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56349?
CVE-2026-56349 is a medium-severity vulnerability in n8n, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-20
Which versions are affected by CVE-2026-56349?
2 open source packages ship an affected version, including n8n.
| Package | Affected | Fixed in |
|---|---|---|
n8n npm | All versions | 2.10.0 |
n8n npm | All versions | 2.10.0 |
How do I fix CVE-2026-56349?
Upgrade n8n to 2.10.0 or later.
Is CVE-2026-56349 being exploited?
There is no known exploitation of CVE-2026-56349 in the wild and no public exploit code.
Sources
Also known as GHSA-9v3h-fx77-8r29, GHSA-fvfv-ppw4-7h2w.