CVE-2026-85995
Notepad++: Authenticode verification bypass allows modified updater execution
- State
- Published
- Severity
- 7.3 High
- Published
- Sep 22, 2026
- Updated
- Sep 22, 2026
- Reserved
- Sep 4, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.3 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-347 Improper Verification of Cryptographic Signature
Affected Products
| Product | Versions |
|---|---|
notepad-plus-plusnotepad-plus-plus |
|
References
- https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-cx87-7hhq-m2j3
- https://github.com/notepad-plus-plus/notepad-plus-plus/commit/9edf40f725ce62b26c454905e39f0f7fdbbb3ffa
- https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.8
- https://notepad-plus-plus.org/news/v898-released
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.