CVE-2026-85995
Notepad++: Authenticode verification bypass allows modified updater execution
CVSS Score
7.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-347 |
| Vendor | notepad-plus-plus |
| Product | notepad-plus-plus |
| Published | Sep 22, 2026 |
| Last Updated | Sep 22, 2026 |
Stay Ahead of the Next One
Get instant alerts for notepad-plus-plus notepad-plus-plus
Be the first to know when new high vulnerabilities affecting notepad-plus-plus notepad-plus-plus are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
notepad-plus-plus / notepad-plus-plus
< 8.9.8
References
github.com: https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-cx87-7hhq-m2j3 github.com: https://github.com/notepad-plus-plus/notepad-plus-plus/commit/9edf40f725ce62b26c454905e39f0f7fdbbb3ffa github.com: https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.8 notepad-plus-plus.org: https://notepad-plus-plus.org/news/v898-released