CVE-2026-71858: Notepad-Plus-Plus

Medium severity, CVSS 5.4. EPSS: 0.1% chance of exploitation in the next 30 days.

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, macros loaded from an attacker-controlled shortcuts.xml bypass the HMAC validation applied to UserDefinedCommands and can invoke Scintilla actions and the internal Open in Default Viewer command in an elevated Notepad++ process, allowing protected file modification and conditional elevated command execution when a local attacker influences settingsDir and a user triggers the macro. This issue is fixed in version 8.9.7.

Affected products

• Notepad-Plus-Plus Notepad-Plus-Plus: before 8.9.7 (fixed in 8.9.7)

Published 2026-08-17. Last modified 2026-09-09.