high7.8
CVE-2026-54758
Notepad++ is a free and open-source source code editor.
Impact
Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the expandNppEnvironmentStrs function in PowerEditor/src/WinControls/StaticDialog/RunDlg/RunDlg.cpp copies a Notepad++ variable name between $( and ) into the fixed-size wchar_t str[MAX_PATH] stack buffer without bounding the m loop index, allowing a name of 260 or more characters to corrupt adjacent stack data, terminate the process through __report_gsfailure, and potentially execute code. This issue is fixed in version 8.9.7.
Affected products
| Product | Affected versions |
|---|---|
| Notepad++ Is A Free And Open-Source Source Code Editor. | before 8.9.7 |
Versions were read from the advisory text. No structured product data has been published for this record yet.