CVE-2026-42214

[CVE catalog]

Notepad Next is a cross-platform, reimplementation of Notepad++. Prior to version 0.14, NotepadNext's detectLanguageFromExtension() function interpolates a file's extension directly into a Lua script without sanitization. An attacker can craft a filename whose extension contains Lua code, which executes automatically when the victim opens the file in NotepadNext. Because luaL_openlibs() is called unconditionally, the full os, io, and package libraries are available to the injected code, enabling arbitrary command execution. This issue has been patched in version 0.14.

Severity

High · CVSS 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

May 7, 2026, 7:16:01 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.24% · Oct 27, 2026

{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "notepad_next",
      "ecosystem": "cpe",
      "fixed_version": "0.14",
      "provider_source": "nvd"
    },
    {
      "name": "notepad_next",
      "ranges": [
        {
          "fixed": "0.14",
          "introduced": "",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "provider_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42214",
      "fixed_version": "0.14",
      "provider_source": "nvd",
      "provider_record_id": "NVD-CVE-2026-42214",
      "provider_updated_at": "2026-10-26T20:10:00.160"
    }
  ]
}