VULNERABILITY INTELLIGENCE
CVE-2026-57233
CVSS score8.1 HIGH
EPSS probability0.51%
CISA KEVNot currently listed
Published2026-08-17
Last modified2026-09-09
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
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.
Weakness classification
- CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')