CVE-2026-85288: Notepad-Plus-Plus

Medium severity, CVSS 6.7. EPSS: 0.1% chance of exploitation in the next 30 days.

Notepad++ is a free and open-source source code editor. Prior to 8.9.8, Notepad++ incompletely enforces shortcuts.xml HMAC validation because WM_MACRODLGRUNMACRO, the Run a Macro Multiple Times entry point, calls macroPlayback() without the validation used by command(). A tampered shortcuts.xml macro that is blocked through the Macro menu or a shortcut key can therefore execute through the multi-run dialog and invoke internal Notepad++ commands, including commands that launch external programs, in the current user context. This issue is fixed in version 8.9.8.

Affected products

• Notepad-Plus-Plus Notepad-Plus-Plus: before 8.9.8 (fixed in 8.9.8)

Published 2026-09-22. Last modified 2026-09-26.