CVE-2026-52886

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, Notepad++ validates the backupFilePath attribute from session.xml with std::wstring::starts_with against the expected backup directory without path normalization, allowing parent-directory sequences during snapshot-mode restoration to read an arbitrary user-readable file outside the backup directory into an editor tab. This issue is fixed in version 8.9.7.

Affected products

Notepad++

CVSS 4.0

5.1 MEDIUM

EPSS

0.2% (15th percentile)

Weakness

CWE-22

NVD status

Received

Published

2026-08-17