---
id: CVE-2026-73250
title: Notepad++ is a free and open-source source code editor
summary: >-
  Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the
  Notepad++ Windows 11 x64 and ARM64 installer passes the attacker-influenced
  installation directory `$INSTDIR` from PowerEditor/installer/nppSetup.nsi into
  a Powe…
severity: none
cwe:
  - CWE-77
published: '2026-08-11'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:58:37.713'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73250'
references:
  - url: >-
      https://github.com/notepad-plus-plus/notepad-plus-plus/commit/3764d5b72664ef95421bc53bcb204f9b977d346b
    label: security-advisories@github.com
  - url: 'https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.7'
    label: security-advisories@github.com
  - url: >-
      https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-gp2r-262h-9hgf
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.0019
epssPercentile: 0.07729
ingestedAt: '2026-09-09T21:22:45.530Z'
---

## Overview

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the Notepad++ Windows 11 x64 and ARM64 installer passes the attacker-influenced installation directory `$INSTDIR` from PowerEditor/installer/nppSetup.nsi into a PowerShell `-Command` string used by RegisterMSIX to invoke Add-AppxPackage, allowing PowerShell subexpression syntax such as `$()` in the installation path to execute commands in the installer's security context when the context menu component is selected. This issue is fixed in version 8.9.7.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.