CVE-2026-73250

Notepad++: Install-time PowerShell command injection through installation path

Published: Aug 11, 2026Updated: Sep 9, 2026 Sources: CVE List NVDCWE-77

N/ACVSS

NVD MITRE

Description

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.

No summary for this CVE yet.

Weaknesses

CWE-77

Affected Products

notepad-plus-plus

commercialaka notepad+ plus, notepad plus plus, notepad++

notepad-plus-plusOn-prem

Consumer Software / productivity

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

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References

https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-gp2r-262h-9hgf

github.com

https://github.com/notepad-plus-plus/notepad-plus-plus/commit/3764d5b72664ef95421bc53bcb204f9b977d346b

github.com

https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.7

github.com

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