Description
Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the WinGup decompress function joins untrusted ZIP entry names to unzipDestTo without canonical containment validation, allowing an entry such as ../mimeTools/mimeTools.dll to overwrite a DLL in a sibling plugin directory and execute attacker-controlled code when Notepad++ next loads that plugin. This issue is fixed in version 8.9.7.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| notepad-plus-plus | notepad-plus-plus | < 8.9.7 | — |
Advisories 1
- WID-SEC-2026-2312 Notepad++: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 17, 2026
References
- https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-hjxw-84rf-wg5r
- https://github.com/notepad-plus-plus/wingup/pull/106
- https://github.com/notepad-plus-plus/wingup/commit/7670296a5c7fdec624e0a45dbde51059a7d735a8
- https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.7