What is CVE-2026-48800?

CVE-2026-48800 is a high-severity vulnerability in Notepad-plus-plus, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-06-26.

How severe is CVE-2026-48800?

High severity. CVSS v3 base score is 7.8 out of 10.

RCE in Notepad-plus-plus

CVE-2026-48800

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, the <Command> tag text content inside <UserDefinedCommands> in shortcuts.xml is read by NppXml::value(aNode) (Parameters.cpp:3658) in the feedUserCmds() function and…

Vulnerability class: Command Injection (OS Command Injection)

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Notepad-plus-plus — versions < 8.9.6.1

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-48800?: CVE-2026-48800 is a high-severity vulnerability in Notepad-plus-plus, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-06-26.
How severe is CVE-2026-48800?: High severity. CVSS v3 base score is 7.8 out of 10.