PatchTheCVECVE-2026-48778: Notepad++ is a free and open-source source code editor
CVE-2026-48778 is a high-severity flaw (CVSS 7.8) affecting notepad\+\+. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the <GUIConfig name="commandLineInterpreter"> 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
Why this priority
- High severity
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.8 (High) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.6% (top 51%) |
| CISA exploited list | No |
| Weakness | CWE-78 |
| Published | 2026-06-26 |
| Last modified | 2026-06-29 |
Last updated 2026-06-29 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Exploit-DB: Notepad++ 8.9.6 - Arbitrary Code Execution
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-48778?
notepad\+\+: upgrade to 8.9.6.1. Exact commands for each OS are on this page.
Is CVE-2026-48778 being exploited?
CVE-2026-48778 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-48778 affect?
CVE-2026-48778 affects notepad\+\+. Severity is high (CVSS 7.8). Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the <GUIConfig name="commandLineInterpreter"> tag in config.xml is read by NppXml::value() (Parameters.cpp:6430) and stored in _nppGUI._commandLineInterpreter without
How urgent is CVE-2026-48778?
Priority 45/100. High severity; Public exploit reference
Software pages
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