CVE-2026-57233

Published: Aug 17, 2026Modified: Sep 9, 2026

8.1

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Exploitability: 2.8 / Impact: 5.2

Source: security-advisories@github.com (Secondary)

Description

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the WinGup decompress function joins untrusted ZIP entry names to unzipDestTo without canonical containment validation, allowing an entry such as ../mimeTools/mimeTools.dll to overwrite a DLL in a sibling plugin directory and execute attacker-controlled code when Notepad++ next loads that plugin. This issue is fixed in version 8.9.7.

Related CWEs

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (5)

https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.7

Source: security-advisories@github.com

https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-hjxw-84rf-wg5r

Source: security-advisories@github.com

https://github.com/notepad-plus-plus/wingup/commit/7670296a5c7fdec624e0a45dbde51059a7d735a8

Source: security-advisories@github.com

https://github.com/notepad-plus-plus/wingup/pull/106

Source: security-advisories@github.com

https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-hjxw-84rf-wg5r

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.