Vulnerability Intelligence Report
Notepad++: Path Traversal (Zip Slip) in WinGup Plugin Extraction
CVE-2026-57233
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.
Path Traversal
No Active Exploit Signals
CVSS Base Score
8.1
HIGH
Exploitability:2.9
Impact Score:5.2
EPSS Probability:0.48%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-22 ↗CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| notepad-plus-plus | notepad-plus-plus | < 8.9.7 (affected) |
Threat Intelligence Signals
EPSS Score
0.480%
Vulnerability Class
Path Traversal
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | GitHub, Inc. · Vendor · USA |
| Reserved | 2026-06-24T02:21:33 |
| Published | 2026-08-17T20:10:37 |
| Last Updated | 2026-08-18T18:53:27 |
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