Cloudanix VulnDB

CVE-2026-54758

High · 7.8

CVSS

7.8

EPSS

0.2%

Published

Aug 17, 2026

CISA due date

—

The record

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 packages

Ecosystem Package Introduced Fixed

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