RCE in Dail8859 Notepad_next
CVE-2026-42214
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 c…
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.000 (3.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Dail8859 Notepad_next
- Dail8859 Notepadnext — versions < 0.14
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-42214?
- CVE-2026-42214 is a high-severity vulnerability in Dail8859 Notepad_next, classified under Code Injection. CVSS score: 7.8/10. Published 2026-05-07.
- How severe is CVE-2026-42214?
- High severity. CVSS v3 base score is 7.8 out of 10.