# CVE-2026-48778: Notepad++: Arbitrary Code Execution via config.xml commandLineInterpreter CVE-2026-48778 is fixed in Notepad++ on 1 platform by Notepad++ 8.9.6.1 (version 8.9.6.1), released May 26, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-48778 - Priority: High - CVSS: 7.8 - EPSS: 0.0062 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 26, 2026 - Weakness: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') - Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-48778 ## Description Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the tag in config.xml is read by NppXml::value() (Parameters.cpp:6430) and stored in _nppGUI._commandLineInterpreter without any validation, whitelist, or digital signature check. When the user triggers IDM_FILE_OPEN_CMD (File → Open Containing Folder → cmd), NppCommands.cpp:228 creates a Command object with this value and calls run(), which invokes ShellExecute (RunDlg.cpp:221) with the attacker-controlled string as the executable path. This vulnerability is fixed in 8.9.6.1. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Windows apps | Notepad++ | 8.9.6.1 | [Notepad++ 8.9.6.1](https://patchblox.com/security/data/fix/windows-app/notepad-.notepad-8.9.6.1.md) | May 26, 2026 | --- Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.