CVE-2026-85995: Notepad-Plus-Plus

High severity, CVSS 7.3. EPSS: 0.1% chance of exploitation in the next 30 days.

Notepad++ is a free and open-source source code editor. From 8.9.7 until 8.9.8, the Notepad++ updater and signature verification path can accept a modified GUP.exe file whose embedded certificate metadata remains present even though its Authenticode digest is invalid. An attacker who can replace or plant the updater-related file can cause Notepad++ to launch attacker-modified code when a user triggers the updater path, but the issue does not provide remote code execution by itself. 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 2026-09-23.