---
id: CVE-2026-112942
title: 'launch-editor: `fs.existsSync()` existence check can be bypassed on Windows'
summary: >-
  launch-editor allows users to open files with line numbers in editor from
  Node.js. Prior to 2.14.2, launch-editor-middleware processes an
  attacker-controlled Windows file argument where the file argument ends in a
  parent-directory compon…
severity: high
cvss: 7.5
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-77
vendor: vitejs
product: launch-editor
affected:
  - launch-editor < 2.14.2
  - 'vite >= 8.3.0, < 8.3.3'
  - 'vite >= 8.2.0, < 8.2.4'
  - 'vite >= 8.0.0, < 8.1.6'
  - 'vite >= 7.0.0, < 7.3.7'
  - vite < 6.4.4
  - vite-plus < 1.1.0
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T14:48:06.676Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112942'
references:
  - url: >-
      https://github.com/vitejs/launch-editor/security/advisories/GHSA-587h-7wmj-h5pm
    label: >-
      https://github.com/vitejs/launch-editor/security/advisories/GHSA-587h-7wmj-h5pm
  - url: >-
      https://github.com/vitejs/launch-editor/commit/f13cd835d4b8e860b1d4d080ad8a490cc2463679
    label: >-
      https://github.com/vitejs/launch-editor/commit/f13cd835d4b8e860b1d4d080ad8a490cc2463679
  - url: 'https://github.com/vitejs/launch-editor/releases/tag/v2.14.2'
    label: 'https://github.com/vitejs/launch-editor/releases/tag/v2.14.2'
tags:
  - cve.org
ingestedAt: '2026-10-20T15:09:24.115Z'
---

## Overview

launch-editor allows users to open files with line numbers in editor from Node.js. Prior to 2.14.2, launch-editor-middleware processes an attacker-controlled Windows file argument where the file argument ends in a parent-directory component plus a line-and-column suffix: the path is resolved while the suffix is still present, and launch-editor removes the suffix before its existsSync check, leaving the existing parent directory for existsSync and allowing the attacker-controlled file argument to pass filename existence validation without requiring the malicious filename to exist. The bypass can lead to OS command injection when combined with the separately described Windows percent-expansion flaw. This issue is fixed in version 2.14.2.

## Affected

- `launch-editor < 2.14.2`
- `vite >= 8.3.0, < 8.3.3`
- `vite >= 8.2.0, < 8.2.4`
- `vite >= 8.0.0, < 8.1.6`
- `vite >= 7.0.0, < 7.3.7`
- `vite < 6.4.4`
- `vite-plus < 1.1.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.