---
id: "CVE-2026-118640"
kind: "vulnerability"
aliases: ["CVE-2026-118640"]
title: "n8n: chat-only users can register restricted tools and run workflows"
severity: "medium"
cvss: 5.4
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: []
ecosystems: []
tags: ["ai-agents", "ai-tooling", "n8n", "self-hosted", "workflows"]
not_affected_if: ["no-chat-users", "patched-version"]
published_at: "2026-10-28T19:17:31+00:00"
first_seen_at: "2026-10-28T19:34:55+00:00"
updated_at: "2026-10-28T19:36:13+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118640", "first_seen_at": "2026-10-28T19:34:55+00:00"}]
---

# n8n: chat-only users can register restricted tools and run workflows

n8n Chat Hub lets users with the global:chatUser role register restricted tool types they should not have access to. An attacker with a chat-only account can run sandboxed code, reach permitted files, and use instance workflows, Data Tables, and agents.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `n8n --version` (or check the image tag) and compare against `1.123.85`, `2.43.5` and `2.44.1`
- List users holding the `global:chatUser` role in the n8n admin settings and confirm whether chat-only accounts exist

## Fix

- Upgrade n8n to `1.123.85` on the 1.x line, `2.43.5` on the 2.43 line, or `2.44.1` on the 2.44 line
- Until patched, remove the `global:chatUser` role from untrusted accounts

## Timeline

- 2026-10-28T19:34:55+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118640

## From the sources

n8n before 1.123.85, 2.43.5, and 2.44.1 contains an authorization bypass vulnerability in Chat Hub that allows chat-only users to register restricted tool types. Users with the global:chatUser role can add and run tools through chat to execute sandboxed code, access permitted files, and use instance workflows, Data Tables, and agents.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_