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Vulnerability record · CVE-2026-42214 · published 7 May 2026

CVE-2026-42214: Dail8859 notepad next code injection vulnerability

DDail8859 · Notepad Next

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.

7.8 CVSS 3.1 High EPSS 0.28% · top 81.6% CWE-94 · Code injection
7.8CVSS 3.1 base score
0.28%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/dail8859/NotepadNext/commit/f3ca1b10aca52f05fd7f4f5ebf9b566d6cd95ccc Patch
https://github.com/dail8859/NotepadNext/releases/tag/v0.14 Release Notes
https://github.com/dail8859/NotepadNext/security/advisories/GHSA-m5fq-c9x5-w54g ExploitMitigationVendor Advisory
https://github.com/dail8859/NotepadNext/security/advisories/GHSA-m5fq-c9x5-w54g ExploitMitigationVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-42214), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.