---
id: "CVE-2026-126387"
page: "https://infrastack.ai/live/CVE-2026-126387"
kind: "vulnerability"
aliases: ["CVE-2026-126387"]
title: "n8n: Browser Use upload tool reads arbitrary server files for members"
severity: "medium"
cvss: 6.0
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: []
ecosystems: []
tags: ["ai-agents", "ai-tooling", "browser-use", "n8n", "self-hosted"]
not_affected_if: ["auth-required", "default-config"]
published_at: "2026-11-13T10:17:42+00:00"
first_seen_at: "2026-11-13T10:47:18+00:00"
updated_at: "2026-11-13T10:56:43+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126387", "first_seen_at": "2026-11-13T10:47:18+00:00"}]
exploit_sources: []
---

# n8n: Browser Use upload tool reads arbitrary server files for members

Link for people: https://infrastack.ai/live/CVE-2026-126387 (this .md is for agents)

n8n before 2.46.1 lets an authenticated member pass absolute file paths to the Browser Use browser_upload tool. Playwright then reads those files from the n8n server and returns their contents through the browser page, exposing instance configuration.

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

## How to check

- Check the n8n version with `n8n --version` or the instance's About page; versions below `2.46.1` are affected.
- Check whether the Browser Use tool (AI agent with a connected remote browser) is enabled in workflows.

## Fix

- n8n: move to `2.46.1` or later.

## Timeline

- 2026-11-13T10:47:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126387

## Documents

- [advisory] Maintainer's advisory: github.com https://github.com/n8n-io/n8n/security/advisories/GHSA-9qx8-fhxv-w794
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/n8n-before-2.46.1-arbitrary-file-read-via-browser-use-browser-upload-tool

## From the sources

n8n before 2.46.1 contains an arbitrary file read vulnerability that allows authenticated members to read server files by supplying absolute paths to the Browser Use browser_upload tool. Attackers with a connected remote browser session can have Playwright read files such as instance configuration from the n8n server and retrieve their contents from the page.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_