Path traversal in Notepad++ - CVE-2026-57233
Published: July 14, 2026
Vulnerability identifier: #VU137488
CSH Severity: Medium
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57233
CWE-ID: CWE-22
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to path traversal in WinGup decompress() plugin extraction routine when extracting a crafted plugin zip archive. A local user can supply a specially crafted archive with traversal sequences to execute arbitrary code.
Code execution occurs when Notepad++ later loads the overwritten plugin DLL.
Affected software
Notepad++
How to mitigate CVE-2026-57233
Install security update from vendor's website.
Notepad++ - update to 8.9.7