High severity · published Aug 17, 2026
CVE-2026-57233
Notepad++: Path Traversal (Zip Slip) in WinGup Plugin Extraction
8.1
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NO
notepad-plus-plus · notepad-plus-plus
< 8.9.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57233
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57233
github.com
https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.7
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/commit/7670296a5c7fdec624e0a45dbde51059a7d735a8
github.com
https://github.com/notepad-plus-plus/wingup/pull/106
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