CVE-2026-57233
Notepad++: Path Traversal (Zip Slip) in WinGup Plugin Extraction
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-22 |
| Vendor | notepad-plus-plus |
| Product | notepad-plus-plus |
| Published | Aug 17, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
Affected Versions
notepad-plus-plus / notepad-plus-plus
< 8.9.7
References
github.com: https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-hjxw-84rf-wg5r github.com: https://github.com/notepad-plus-plus/wingup/pull/106 github.com: https://github.com/notepad-plus-plus/wingup/commit/7670296a5c7fdec624e0a45dbde51059a7d735a8 github.com: https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.7