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.
History

Mon, 17 Aug 2026 20:15:00 +0000

Type Values Removed Values Added
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.
Title Notepad++: Path Traversal (Zip Slip) in WinGup Plugin Extraction
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-17T20:10:37.698Z

Reserved: 2026-06-24T02:21:33.811Z

Link: CVE-2026-57233

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-17T20:16:44.453

Modified: 2026-08-17T20:16:44.453

Link: CVE-2026-57233

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T22:15:04Z