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[ CVE-2026-112942 · Published 20 Oct 2026 ]

launch-editor: `fs.existsSync()` existence check can be bypassed on Windows

CVSS 7.5 EPSS 1%Fix available

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

  • launch-editor 2.14.2Fixed version · GitHub Advisories · npm package launch-editor: upgrade to 2.14.2 or later (affected <= 2.14.1)
  • vite 8.3.3Fixed version · GitHub Advisories · npm package vite: upgrade to 8.3.3 or later (affected >= 8.3.0, <= 8.3.2)
  • vite 8.2.4Fixed version · GitHub Advisories · npm package vite: upgrade to 8.2.4 or later (affected >= 8.2.0, <= 8.2.3)
  • vite 8.1.6Fixed version · GitHub Advisories · npm package vite: upgrade to 8.1.6 or later (affected >= 8.0.0, <= 8.1.5)
  • vite 7.3.7Fixed version · GitHub Advisories · npm package vite: upgrade to 7.3.7 or later (affected >= 7.0.0, <= 7.3.6)
  • vite 6.4.4Fixed version · GitHub Advisories · npm package vite: upgrade to 6.4.4 or later (affected <= 6.4.3)
  • vite-plus 1.1.0Fixed version · GitHub Advisories · npm package vite-plus: upgrade to 1.1.0 or later (affected <= 1.0.0)

[ Packages ]Affected open-source packages

[ References ]References