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Common Weakness Enumeration

CWE-42

Path Equivalence: 'filename.' (Trailing Dot)

Category: VariantCVE: 1
Description

The product accepts path input in the form of trailing dot ('filedir.') without appropriate validation, which can lead to ambiguous path resolution and allow an attacker to traverse the file system to unintended locations or access arbitrary files.

CVE vulnerabilities with CWE-42 (1)
7.8
CVSS
HIGH
CVE-2026-52884

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.

pub. 2026-06-26
Information
ID: CWE-42
Type: Variant
Vulnerabilities: 1
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