CVE-2026-42214
High · 7.8CVSS
7.8
EPSS
0.3%
Published
May 7, 2026
CISA due date
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The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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