7.8High
CVE-2026-52884Notepad++: CVE-2026-48800 Bypass
Description
Notepad++ is a free and open-source source code editor. In v8.9.6.1, isInTrustedDirectory() does NOT canonicalize the path before checking. It uses a prefix-based check (PathIsPrefix() or equivalent) that matches paths starting with trusted directory strings. A path traversal using ..\..\ after a trusted directory prefix passes the check while resolving to an untrusted location. The CVE-2026-48800 patch adds isInTrustedDirectory() validation in Command::run() (RunDlg.cpp) before calling ShellExecute(). This function checks whether the resolved executable path is under a trusted directory. This vulnerability is fixed in 8.9.6.2.
Weakness (CWE):
CWE-42
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| notepad-plus-plus | notepad-plus-plus | = 8.9.6.1 | |
| notepad-plus-plus | notepad++ | 8.9.6.1 |
References and patches
CPE matches (NVD) (1)
cpe:2.3:a:notepad-plus-plus:notepad\+\+:8.9.6.1:*:*:*:*:*:*:*